## Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole

# Chapter 3 - Exponents, Polynomials and Functions - 3.5 Special Factoring Techniques - 3.5 Exercises: 22

#### Answer

$7(2h+3)(2h-3)$

#### Work Step by Step

First, pull out the greatest common factor. Then use the formula $a^2-b^2=(a+b)(a-b)$ to factor. $28h^2-63$ $=7(4h^2-9)$ $=7(2h+3)(2h-3)$

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