Answer
$49x^2-16y^2$
Work Step by Step
FOIL the terms in the parentheses in order to distribute the multiplication. Then combine like terms to simplify.
$(7x+4y)(7-4y)$
$49x^2-28xy+28xy-16y^2$
$49x^2-16y^2$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Summary, Review, and Test - Review Exercises - Page 91: 87
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