Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 3 - Exponents, Polynomials and Functions - 3.5 Special Factoring Techniques - 3.5 Exercises - Page 279: 22



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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