Answer
$64y^2+9x^2-48xy-49$
Work Step by Step
$ [8y + (7 - 3x)][8y - (7 - 3x)] $
$=(8y+ 7 - 3x)(8y - 7 - 3x)$
$=64y^2-56y-24xy+56y-49-21x-24xy+21x+9x^2$
$=64y^2+9x^2-48xy-49$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.4 - Polynomials - Exercise Set - Page 56: 78
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