## Elementary Algebra

Published by Cengage Learning

# Chapter 5 - Exponents and Polynomials - Chapter 5 Review Problem Set - Page 231: 47

#### Answer

$7x-6$

#### Work Step by Step

We use the rules of simplifying fractions to find: $(21x^2-4x-12)\div(3x+2)=\frac{21x^2-4x-12}{3x+2}=\frac{(3x+2)(7x-6)}{3x+2}=7x-6$

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