Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 6 - Factoring, Solving Equations, and Problem Solving - 6.2 - Factoring the Difference of Two Squares - Problem Set 6.2 - Page 247: 10


$ (2a-9b)(2a+9b)$

Work Step by Step

The given expression can be written as: $=(2a)^2-(9b)^2$ RECALL: A difference of two squares can be factored using the formula: $x^2-y^2=(x-y)(x+y)$ Use the formula above with $x=2a$ and $y=9b$ to obtain: $= (2a-9b)(2a+9b)$
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