Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.4 - Polynomials - Exercise Set: 78

Answer

$64y^2+9x^2-48xy-49$

Work Step by Step

$ [8y + (7 - 3x)][8y - (7 - 3x)] $ $=(8y+ 7 - 3x)(8y - 7 - 3x)$ $=64y^2-56y-24xy+56y-49-21x-24xy+21x+9x^2$ $=64y^2+9x^2-48xy-49$
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