6 + x = 12 6 + x = 12. To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then evaluate the expression.1. Substitute the values for the variables. we plug in -1 for x and 3 for y. 2. Identify grouping symbols, beginning with the innermost symbols. We take exponent and then we multiply . 3. Determine and apply the rules of exponents to simplify (-1)^4 = -1 * -1 * -1 * -1 = 1 (3)^3 = 3*3*3= 27. 4. Evaluate. 162. The value of the expression is 162Study with Quizlet and memorize flashcards containing terms like Which graph shows the solution to the equation 4x - 3 = 8?, To solve e4 - 3x = mr001-1.jpgx + 9 by graphing, which equations should be graphed?, Complete the steps to solve the equation 4e2 + 2x = x − 3 by graphing.Basic Math. Math Calculator. Step 1: Enter the expression you want to evaluate. The Math Calculator will evaluate your problem down to a final solution. You can also add, subtraction, multiply, and divide and complete any arithmetic you need. Step 2: Click the blue arrow to submit and see your result! In Exercises 83–90, evaluate each expression without using a calculator. 27^(1/3) Start typing, then use the up and down arrows to select an option from the list.The power of half, shows the radical surd form of a number. To eliminate this fractional power, square both the sides. Solve the equation further as, Thus to complete the work first subtract with 5 both side of expression, then square both side to find the possible solution of equation which is 14. Learn more about the radical surd here;Oct 10, 2020 · Find an answer to your question Vincent wrote an example of a proportion on the board. es002-1.jpg Evaluate Vincent’s proportion to determine if it is correct.… helplease helplease 10.10.2020 Mar 14, 2018 · The given expression is a sum of two cubes. The factorization of the given expression is . Given: The given identity is, . It is required to factorize using the given identity. The given expression can be written in the form of sum of two cubes as, Here, a and b are and respectively. Now, the factorization of the given expression can be one as, Oct 10, 2020 · Find an answer to your question Vincent wrote an example of a proportion on the board. es002-1.jpg Evaluate Vincent’s proportion to determine if it is correct.… helplease helplease 10.10.2020 We would like to show you a description here but the site won’t allow us. Fresh features from the #1 AI-enhanced learning platform. Explore the lineup Fresh features from the #1 AI-enhanced learning platform Crush your year with the magic of personalized studying.1. Substitute the values for the variables. we plug in -1 for x and 3 for y. 2. Identify grouping symbols, beginning with the innermost symbols. We take exponent and then we multiply . 3. Determine and apply the rules of exponents to simplify (-1)^4 = -1 * -1 * -1 * -1 = 1 (3)^3 = 3*3*3= 27. 4. Evaluate. 162. The value of the expression is 162What is the simplest form of mc001-1.jpg. (A) sqrt 2. Which expression should you multiply the numerator and denominator of mc001-1.jpg by to rationalize the denominator? C. What is mc002-1.jpg in simplest form? A. What is the simplest form of mc001-1.jpg. D. The gravitational force formula is mc001-1.jpg where F is the force between two ...The expression simplified by the student is an indicinal expression. Indices are mathematical expressions that show the number of times a number or variable is being multiplied by itself. According to the law of indices. where a, and n are integers or fractions. Given the expression simplified by the student expressed as: Using the laws above:Basic Math. Math Calculator. Step 1: Enter the expression you want to evaluate. The Math Calculator will evaluate your problem down to a final solution. You can also add, subtraction, multiply, and divide and complete any arithmetic you need. Step 2: Click the blue arrow to submit and see your result!Oct 10, 2020 · Find an answer to your question Vincent wrote an example of a proportion on the board. es002-1.jpg Evaluate Vincent’s proportion to determine if it is correct.… helplease helplease 10.10.2020 Jul 8, 2019 · richard bought 3 slices of cheese pizza and 2 sodas for $8.75. Jordan bought 2 slices of cheese pizza and 4 sodas for $8.50. How much would an order of 1 slice of cheese pizza and 3 sodas cost? A. $3.25 B. $5.25 C. $7.75 D. $7.25 Oct 20, 2018 · 1. Substitute the values for the variables. we plug in -1 for x and 3 for y. 2. Identify grouping symbols, beginning with the innermost symbols. We take exponent and then we multiply . 3. Determine and apply the rules of exponents to simplify (-1)^4 = -1 * -1 * -1 * -1 = 1 (3)^3 = 3*3*3= 27. 4. Evaluate. 162. The value of the expression is 162 Jan 26, 2018 · Since we are not given the exact radian value to convert, we can assume the value of radians. Using the conversion factor: To convert radians to degrees, we will write: radians = x. Divide both expressions: Hence the value of radians to degrees is 90 degrees. shown on the unit circle. x =. -1/2. y=? - sqrt 3/2. Consider all angles whose reference angle is 45° with terminal sides not in Quadrant I. The angles that share the same cosine value as cos 45° have terminal sides in quadrant . IV. The angles that share the same sine value as sin (45°) have terminal sides in quadrant.Study with Quizlet and memorize flashcards containing terms like Which is a coefficient matrix for the system of linear equations? mc014-1.jpg mc014-2.jpg mc014-3.jpg mc014-4.jpg mc014-5.jpg, What is the determinant of the coefficient matrix of the system ? -158 -117 65 117, Suppose matrix D is the inverse of matrix C. Which of the following is equal to D? CDD CCD DDD CCC and more.Video transcript. - So we have the graphs of two functions here. We have the graph y equals f of x and we have the graph y is equal to g of x. And what I wanna do in this video is evaluate what g of, f of, let me do the f of it another color, f of negative five is, f of negative five is. And it can sometimes seem a little daunting when you see ... However, this isn't necessary, since you can just change the expression inside the sum to get the same effect. So if you have the sum from i=1 to 10 of i², and you want to i to step by 1/3 instead of 1, you can change the expression i² to (1+(i-1)/3)², and have i go from i=1 to 28.Study with Quizlet and memorize flashcards containing terms like Which of the following show a geometric series? Select all that apply., Identify the value of r and a1 for each geometric series., 0.25 + 1 + 4 + 16 + 64 Enter the values used in finding a partial sum. and more.May 8, 2018 · The value of heat of the reaction for the given chemical reaction is equal to -175.91 kJ.. How do we calculate the change in enthalpy of the reaction? Change in enthalpy of the reaction is calculated by substracting the total sum of enthalpies of reacatnts from the the total sum of the enthalpies of products. 2. Which least 6-digit number is exactly divisible by 75? The product of ages of all Mr. products children is 1408 the age of the youngest child is equal to half the age of the oldest child how many children. The first term of an A.P. is 3, the last term 90 and the sum 1395. find the number of term .In Mathematics, alphabets or letters referred to as variables are used to denoted the missing values in an algebraic expression. Thus, we would solve for the unknown variables as follows: Lowest common multiple ( LCM) =. Taking the LCM of the left-hand side, we have: By comparison, we have: a = 3. b = 4. Therefore, the missing values are 3 and ...Oct 10, 2020 · Find an answer to your question Vincent wrote an example of a proportion on the board. es002-1.jpg Evaluate Vincent’s proportion to determine if it is correct.… helplease helplease 10.10.2020 Where is each point located on the graph? -3 + 8i is: in quadrant II. 4i is: on the vertical axis. 6 is: on the horizontal axis. 5-2i is: in quadrant IV. Select the expression that is equivalent to |4-3i|. 5. Compare and contrast the absolute value of a real number to that of a complex number. imaginary number complex plane real number negative ...We write numbers in exponent form because it is more compact to write repetitive multiplications a large number of times.It defines how many times a number is being multiplied to it self. We know exponents describe how many times a number is repetitively multiplied by itself. Given 27^2/27^4/3 which can be written as which is = .May 8, 2018 · The value of heat of the reaction for the given chemical reaction is equal to -175.91 kJ.. How do we calculate the change in enthalpy of the reaction? Change in enthalpy of the reaction is calculated by substracting the total sum of enthalpies of reacatnts from the the total sum of the enthalpies of products. To calculate a determinant you need to do the following steps. Set the matrix (must be square). Reduce this matrix to row echelon form using elementary row operations so that all the elements below diagonal are zero. Multiply the main diagonal elements of the matrix - determinant is calculated. To understand determinant calculation better input ...Evaluate the numerical value of the vertical velocity of the car at time t=0. 25s using the expression from part d, where y0=0. 75m, α=0. 95s−1, and ω=6. 3s−1.Feb 21, 2022 · Identify the reference angle es001-1. Jpg for each given angle, es001-2. Jpg. Es001-3. Jpg degrees. Es002-1. Jpg degrees. Es003-1. Jpg degrees. Apr 15, 2019 · Evaluate this (-1/5)^2. Help! 4/5x - 1/4x = 11 -0.65x + 0.45x = 5.4 (answer must fit the layout) which place do I use to compare 60,618 and 60,647? Evaluate the expression when =x−7 and =y2 . −x6y. Customize your avatar with a never-ending variety of clothing options, accessories, gear, and more! The matching is defined as 1-B, 2-C, 3-E, 4-D, 5-A. Step-by-step explanation: The given expression are. 1. Therefore the answer of this expression is option B. 2. Therefore the answer of this expression is option C. 3. Therefore the answer of this expression is option E. 4. Therefore the answer of this expression is option D. 5.The order of operations is used to evaluate and simplify composite functions, working from the inside out by substituting one function in place of the variable for another funtion. Steps outlined to algebraically find the inverse function: Substitute f (x) with y. Reverse the x and y variables. Solve for y. Replace y with the inverse notation f ... Study with Quizlet and memorize flashcards containing terms like How will this system at equilibrium be affected by each of the conditions stated here? es001-1.jpg removal of H2O addition of O2 decrease in pressure increase in temperature, Which contain a common ion that will shift the equilibrium system represented by the equation shown? Select all that apply. How will the addition of HCl ...Dilation - stretching or compressing the graph of a function. Move the slider on the graph to graph each function and describe the transformation. y=2_/x. vertical stretch. y=0.5_/x. vertical compression. Which of the following statements are true? Check all of the boxes that apply. A.Solve: 2cos (x) + sqrt2 = 0 for 0 <= x <= 2pi. Chech all that apply. 3pi/4. 5pi/4. Solve: tan (x) - cos^2 (x) = sin^2 (x) [A] pi/4 + kpi. The motion of a weight that hangs from a spring is represented by the equation h = 8sin ( 2pi/3 t). It models the weight's height (in inches) above or below the rest position as a function of time (in seconds ...Use the given graph to determine if there are any solutions to the equation − (5)3 − x + 4 = −2x. A. The solution is approximately 1.7 because it is the x-value of the intersection of the functions. We have an expert-written solution to this problem! Find the solutions to the equation 102x + 11 = (x + 6)2 - 2. Study with Quizlet and memorize flashcards containing terms like Given f(x) = x - 2 andmc001-1.jpg which of the following values is not in the domain of mc001-2.jpg, Given f(x) = 3x - 5 and mc001-1.jpg what is mc001-2.jpg, Given mc001-1.jpg and mc001-2.jpg, mc001-3.jpg The range of es002-1.jpg is and more.Jan 26, 2018 · Since we are not given the exact radian value to convert, we can assume the value of radians. Using the conversion factor: To convert radians to degrees, we will write: radians = x. Divide both expressions: Hence the value of radians to degrees is 90 degrees. In Mathematics, alphabets or letters referred to as variables are used to denoted the missing values in an algebraic expression. Thus, we would solve for the unknown variables as follows: Lowest common multiple ( LCM) =. Taking the LCM of the left-hand side, we have: By comparison, we have: a = 3. b = 4. Therefore, the missing values are 3 and ...Feb 23, 2020 · Simplify each expression. - 2650912 ... Simplify each expression. mc001-1.jpg See answer Advertisement Advertisement shekinahdawne shekinahdawne =tjk 89 because it is ... The simplified expression of the ... Express 4 as the square of 2. Multiply the radicals. Evaluate the products ... Identify the reference angle es001-1. Jpg for each ...Simplification involves applying rules of arithmetic and algebra to remove unnecessary terms, factors, or operations from an expression. The goal is to obtain an expression that is easier to work with, manipulate, or solve. Given expression, Simplify the right-hand side, By comparison of the exponent's a = 5, b = 2 and c= 11What is mc002-1.jpg in radical form? A) 3√6^2. Find the product with the exponent in simplest form. Then, identify the values of x and y. x= 7, y= 12. Write the expression 6 7/12 in radical form. B) 12√6^7. To calculate a determinant you need to do the following steps. Set the matrix (must be square). Reduce this matrix to row echelon form using elementary row operations so that all the elements below diagonal are zero. Multiply the main diagonal elements of the matrix - determinant is calculated. To understand determinant calculation better input ...Fresh features from the #1 AI-enhanced learning platform. Explore the lineup Fresh features from the #1 AI-enhanced learning platform Crush your year with the magic of personalized studying.The given expression is a sum of two cubes. The factorization of the given expression is . Given: The given identity is, . It is required to factorize using the given identity. The given expression can be written in the form of sum of two cubes as, Here, a and b are and respectively. Now, the factorization of the given expression can be one as,However, this isn't necessary, since you can just change the expression inside the sum to get the same effect. So if you have the sum from i=1 to 10 of i², and you want to i to step by 1/3 instead of 1, you can change the expression i² to (1+(i-1)/3)², and have i go from i=1 to 28. To calculate a determinant you need to do the following steps. Set the matrix (must be square). Reduce this matrix to row echelon form using elementary row operations so that all the elements below diagonal are zero. Multiply the main diagonal elements of the matrix - determinant is calculated. To understand determinant calculation better input ...2 times 8 is 16. Finally, evaluate the subtraction. 9 minus 16 is -7. The expression simplifies to -7. Report an issue with this question. Find the value of this expression. RATIONALE. To solve this expression, evaluate the exponent for each term. Start with the first term,. Any number taken to the power of zero equals 1, soterm,. is equal to 1.Equivalent expressions are expressions with equal ... Evaluate the like terms. 2(x-7)- 2(2x-5) = -2x -4 ... Identify the reference angle es001-1. Jpg for each given ...Jun 15, 2020 · The expression simplified by the student is an indicinal expression. Indices are mathematical expressions that show the number of times a number or variable is being multiplied by itself. According to the law of indices. where a, and n are integers or fractions. Given the expression simplified by the student expressed as: Using the laws above: exercise 2.3.10. Evaluate: 5x − 2y − 9 when x = 7 and y = 8. Answer. Example 2.3.6: evaluate. Evaluate 2x2 + 3x + 8 when x = 4. Solution. We need to be careful when an expression has a variable with an exponent. In this expression, 2x2 means 2 ∙ x ∙ x and is different from the expression (2x)2, which means 2x ∙ 2x.Larry's pet store made $30 before a pipe burst and he had to close early to get it fixed. He realized that he lost es001-1.jpg of a dollar each hour that the store was closed. If the expression that models this situation is 30 es001-2.jpg, what is Larry's profit if the store was closed for 8 hours? $The value of heat of the reaction for the given chemical reaction is equal to -175.91 kJ.. How do we calculate the change in enthalpy of the reaction? Change in enthalpy of the reaction is calculated by substracting the total sum of enthalpies of reacatnts from the the total sum of the enthalpies of products.In Mathematics, alphabets or letters referred to as variables are used to denoted the missing values in an algebraic expression. Thus, we would solve for the unknown variables as follows: Lowest common multiple ( LCM) =. Taking the LCM of the left-hand side, we have: By comparison, we have: a = 3. b = 4. Therefore, the missing values are 3 and ...Evaluate each expression if a = 4, b = 6, and c = 8. 8b í a 62/87,21 Replace b with 6 and a with 4. 2a + (b2 · 3) 62/87,21 Replace a with 4 and b with 6. 62/87,21 Replace a with 4 and b with 6. BOOKS Akira bought one new book for $20 and three used books for $4.95 each. Write and evaluate an expression to find how much money the books cost ... In Mathematics, alphabets or letters referred to as variables are used to denoted the missing values in an algebraic expression. Thus, we would solve for the unknown variables as follows: Lowest common multiple ( LCM) =. Taking the LCM of the left-hand side, we have: By comparison, we have: a = 3. b = 4. Therefore, the missing values are 3 and ...To calculate a determinant you need to do the following steps. Set the matrix (must be square). Reduce this matrix to row echelon form using elementary row operations so that all the elements below diagonal are zero. Multiply the main diagonal elements of the matrix - determinant is calculated. To understand determinant calculation better input ... Use the equation es001-1.jpg how many potential solutions are there? Once you've done this, simplify using the order of operations. Evaluate each expression. es001-1.jpg - Brainly.in. Evaluate each expression. es001-1.jpgTo calculate a determinant you need to do the following steps. Set the matrix (must be square). Reduce this matrix to row echelon form using elementary row operations so that all the elements below diagonal are zero. Multiply the main diagonal elements of the matrix - determinant is calculated. To understand determinant calculation better input ...Click here 👆 to get an answer to your question ️ Evaluate each function over the set of real numbers. If f(x) = |x-3|, f (3) = -3 0 1 3 UndefinedThe order of operations is used to evaluate and simplify composite functions, working from the inside out by substituting one function in place of the variable for another funtion. Steps outlined to algebraically find the inverse function: Substitute f (x) with y. Reverse the x and y variables. Solve for y. Replace y with the inverse notation f ...In Exercises 83–90, evaluate each expression without using a calculator. 27^(1/3) Start typing, then use the up and down arrows to select an option from the list.In Mathematics, alphabets or letters referred to as variables are used to denoted the missing values in an algebraic expression. Thus, we would solve for the unknown variables as follows: Lowest common multiple ( LCM) =. Taking the LCM of the left-hand side, we have: By comparison, we have: a = 3. b = 4. Therefore, the missing values are 3 and ...Dilation - stretching or compressing the graph of a function. Move the slider on the graph to graph each function and describe the transformation. y=2_/x. vertical stretch. y=0.5_/x. vertical compression. Which of the following statements are true? Check all of the boxes that apply. A. Study with Quizlet and memorize flashcards containing terms like Which is a coefficient matrix for the system of linear equations? mc014-1.jpg mc014-2.jpg mc014-3.jpg mc014-4.jpg mc014-5.jpg, What is the determinant of the coefficient matrix of the system ? -158 -117 65 117, Suppose matrix D is the inverse of matrix C. Which of the following is equal to D? CDD CCD DDD CCC and more.Where is each point located on the graph? -3 + 8i is: in quadrant II. 4i is: on the vertical axis. 6 is: on the horizontal axis. 5-2i is: in quadrant IV. Select the expression that is equivalent to |4-3i|. 5. Compare and contrast the absolute value of a real number to that of a complex number. imaginary number complex plane real number negative ... richard bought 3 slices of cheese pizza and 2 sodas for $8.75. Jordan bought 2 slices of cheese pizza and 4 sodas for $8.50. How much would an order of 1 slice of cheese pizza and 3 sodas cost? A. $3.25 B. $5.25 C. $7.75 D. $7.25What is the value of mc005-1.jpg? -2. What is the value of log 43? Use the calculator. Round your answer to the nearest tenth. 1.6. Which logarithmic equation is equivalent to 32 = 9? 2=log2 (9) The intensity, or loudness, of a sound can be measured in decibels (dB), according to the equation mc026-1.jpg, where I is the intensity of a given ...Video transcript. - So we have the graphs of two functions here. We have the graph y equals f of x and we have the graph y is equal to g of x. And what I wanna do in this video is evaluate what g of, f of, let me do the f of it another color, f of negative five is, f of negative five is. And it can sometimes seem a little daunting when you see ...Equations : Tiger Algebra gives you not only the answers, but also the complete step by step method for solving your equations es003-1.jpg so that you understand betterWhat is the simplest form of mc001-1.jpg. (A) sqrt 2. Which expression should you multiply the numerator and denominator of mc001-1.jpg by to rationalize the denominator? C. What is mc002-1.jpg in simplest form? A. What is the simplest form of mc001-1.jpg. D. The gravitational force formula is mc001-1.jpg where F is the force between two ...We write numbers in exponent form because it is more compact to write repetitive multiplications a large number of times.It defines how many times a number is being multiplied to it self. We know exponents describe how many times a number is repetitively multiplied by itself. Given 27^2/27^4/3 which can be written as which is = .The first step is to change the equations into y format. y= mx + b. The y- intercept of this graph is at the point (0,2). Since the line is going down, the slope is negative.Dilation - stretching or compressing the graph of a function. Move the slider on the graph to graph each function and describe the transformation. y=2_/x. vertical stretch. y=0.5_/x. vertical compression. Which of the following statements are true? Check all of the boxes that apply. A.Study with Quizlet and memorize flashcards containing terms like Write the following expression as a single logarithm with coefficient 1. log3(6c) + log3112, Complete the steps to evaluate log798, given log72 ≈ 0.356. How can you rewrite log798 using the product property?, Write the following expression as a single logarithm with coefficient 1. log910 − log9 12 − log94 and more.Algebra. Evaluate (25^ (-3/2))^ (1/3) (25−3 2)1 3 ( 25 - 3 2) 1 3. Multiply the exponents in (25−3 2)1 3 ( 25 - 3 2) 1 3. Tap for more steps... 25−1 2 25 - 1 2. Rewrite the expression using the negative exponent rule b−n = 1 bn b - n = 1 b n. 1 251 2 1 25 1 2. Simplify the denominator. The value of heat of the reaction for the given chemical reaction is equal to -175.91 kJ.. How do we calculate the change in enthalpy of the reaction? Change in enthalpy of the reaction is calculated by substracting the total sum of enthalpies of reacatnts from the the total sum of the enthalpies of products.Study with Quizlet and memorize flashcards containing terms like Which of the following show a geometric series? Select all that apply., Identify the value of r and a1 for each geometric series., 0.25 + 1 + 4 + 16 + 64 Enter the values used in finding a partial sum. and more.Feb 18, 2016 · asked Feb 12, 2016 in Other Math Topics by Kayla1 Level 1 User (640 points) | 1.7k views. 1 answer. The pentagon has five sides as shown in the figure. The perimeter can be expressed as mc004-1.jpg. asked Mar 8, 2019 by anonymous | 1.2k views. math problem. Given expression: To find the value of at b= 5, we need to substitute the b=5 in the expression, we get. Therefore, the value of is 36, when b=5. star. star. star.Simplify each expression. - 2650912. use the quadratic formula to solve the quadratic equation:a²+11a-12=0Mar 14, 2018 · The given expression is a sum of two cubes. The factorization of the given expression is . Given: The given identity is, . It is required to factorize using the given identity. The given expression can be written in the form of sum of two cubes as, Here, a and b are and respectively. Now, the factorization of the given expression can be one as, The order of operations is used to evaluate and simplify composite functions, working from the inside out by substituting one function in place of the variable for another funtion. Steps outlined to algebraically find the inverse function: Substitute f (x) with y. Reverse the x and y variables. Solve for y. Replace y with the inverse notation f ...Use the given graph to determine if there are any solutions to the equation − (5)3 − x + 4 = −2x. A. The solution is approximately 1.7 because it is the x-value of the intersection of the functions. We have an expert-written solution to this problem! Find the solutions to the equation 102x + 11 = (x + 6)2 - 2.Find an answer to your question Evaluate each expression. 16^5/4 * 16^1/4 / (16^1/2)^2. Click an Item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box.Divide each term in by . ... Rewrite the expression. Step 7.3.5.5. Evaluate the exponent. ... Step 7.5.1. Combine using the product rule for radicals. Determinant Calculator. This determinant calculator can help you calculate the determinant of a square matrix independent of its type in regard of the number of columns and rows (2x2, 3x3 or 4x4). You can get all the formulas used right after the tool. Number of rows (R) and columns (C): *. Matrix Addition Calculator. Matrix Power Calculator.Larry's pet store made $30 before a pipe burst and he had to close early to get it fixed. He realized that he lost es001-1.jpg of a dollar each hour that the store was closed. If the expression that models this situation is 30 es001-2.jpg, what is Larry's profit if the store was closed for 8 hours? $Apr 15, 2019 · Evaluate this (-1/5)^2. Help! 4/5x - 1/4x = 11 -0.65x + 0.45x = 5.4 (answer must fit the layout) which place do I use to compare 60,618 and 60,647? Evaluate the expression when =x−7 and =y2 . −x6y. Larry's pet store made $30 before a pipe burst and he had to close early to get it fixed. He realized that he lost es001-1.jpg of a dollar each hour that the store was closed. If the expression that models this situation is 30 es001-2.jpg, what is Larry's profit if the store was closed for 8 hours? $ exercise 2.3.10. Evaluate: 5x − 2y − 9 when x = 7 and y = 8. Answer. Example 2.3.6: evaluate. Evaluate 2x2 + 3x + 8 when x = 4. Solution. We need to be careful when an expression has a variable with an exponent. In this expression, 2x2 means 2 ∙ x ∙ x and is different from the expression (2x)2, which means 2x ∙ 2x..