Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 6 - Section 6.4 - Factoring Special Forms - Exercise Set: 43

Answer

$-5y(y-2)(y+2)$

Work Step by Step

Factor out $-5y$ to obtain: $=-5y(y^2-4)$ Write $4$ as $2^2$ to obtain: $=-5y(y^2-2^2)$ The binomial is a difference of two squares. RECALL: A difference of two squares can be factored using the formula: $a^2-b^2=(a-b)(a+b)$ Factor the difference of two squares using the formula above with $a=y$ and $b=2$ to obtain: $=-5y(y-2)(y+2)$
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