## Thinking Mathematically (6th Edition)

Published by Pearson

# Chapter 6 - Algebra: Equations and Inequalities - 6.1 Algebraic Expressions and Formulas - Exercise Set 6.1: 6

18

#### Work Step by Step

Given $x^{2}$ + 9, x = 3 Now put the value of x =3 in the given expression. = $3^{2}$ + 9 = 9+9 =18

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