Answer
$2(8-y)(8+y)$
Work Step by Step
$ 128-2y^{2}\qquad$....factor out $2$.
$=2(64-y^{2})\qquad$...recognize the difference of two squares: $a^{2}-b^{2}=(a-b)(a+b)$
$=2(8-y)(8+y)$
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 6 - Review Exercises - Page 479: 51
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