## Elementary Algebra

Published by Cengage Learning

# Chapter 6 - Factoring, Solving Equations, and Problem Solving - Chapter 6 Test - Page 275: 4

#### Answer

$(x+9)(x+12)$

#### Work Step by Step

Using the rules of factoring trinomials to factor the polynomial, we obtain: $x^{2}+21x+108$ =$x^{2}+9x+12x+108$ =$x(x+9)+12(x+9)$ =$(x+9)(x+12)$

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