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Chapter 1: Q 1.114 (page 72)

Evaluate:4x2-x-5whenx=-2

Short Answer

Expert verified

The value of the expression is13

Step by step solution

01

Step 1. Given Information

It is asked to find values of4x2-x-5whenx=-2

02

Step 2. Evaluating the expression value

The expression is

4x2-x-5

Substitute -2for x. Use parentheses to show multiplication.

=4(-2)2-(-2)-5

Evaluate exponents

=4(4)-(-2)-5

Multiply

=16+2-5

Add

=18-5

Subtract

=13

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Most popular questions from this chapter

In the following exercise, multiply:13(-5)

Lauren has dimes and nickels in her purse. The number of dimes is three more than seven times the number of nickels. Let n represent the number of nickels. Write an expression for the number of dimes.

Identify the like terms:

9,2x3,y2,8x3,15,9y,11y2

Translate the English phrase into an algebraic expression:

(a) Eleven more than x

(b) Fourteen less than 11a.

In the following exercises, translate the phrases into algebraic expressions.

the sum of 13x and 3x
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