Answer
$(1-9xy)(1+9xy)$
Work Step by Step
Given:$1-81x^2y^2$
Equation can be written as:
$=(1)^2-(9xy)^2$
Since, $a^2-b^2=(a-b)(a+b)$
Hence, $(1-9xy)(1+9xy)$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 5 - Review Exercises - Page 400: 53
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