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: 71

Answer

$9x^2-25y^2$

Work Step by Step

RECALL: $(a+b)(a-b) = a^2-b^2$ Multiply the given expression using the formula above with $a=3x$ and $b=5y$ to obtain: $=(3x)^2-(5y)^2 \\=9x^2-25y^2$
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