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: 65

Answer

$49x^2+70xy+25y^2$

Work Step by Step

RECALL: $(a+b)^2=a^2+2ab+b^2$ Use the formula above with $a=7x$ and $b=5y$ to obtain: $=(7x)^2+2(7x)(5y) + (5y)^2 \\=49x^2+70xy+25y^2$
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