Answer
$4x^2-49y^2$
Work Step by Step
Given:$(2x+7y)(2x-7y)$
Apply Formula: $(a-b)(a+b)=a^2-b^2$
This implies
$(2x+7y)(2x-7y)=(2x)^2-(7y)^2$
or, $=4x^2-49y^2$
Hence, the result is : $4x^2-49y^2$
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: 24
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