Answer
$(x-8)(x+8)$
Work Step by Step
RECALL:
$a^2-b^2=(a-b)(a+b)$
Write $64$ as a square to have:
$=x^2-8^2$
Factor using the formula above to have:
$=(x-8)(x+8)$
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter R - Algebra Reference - R.2 Factoring - R.2 Exercises - Page R-8: 21
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