Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 5 - Section 5.5 - Multiplying Polynomials - Exercise Set: 51

Answer

$49x^{2}y^{2}-14xy^{2}+y^{2}$

Work Step by Step

$(7xy-y)^{2}=(7xy-y)(7xy-y)=7xy(7xy-y)-y(7xy-y)=(7xy)(7xy)+(7xy)(-y)-y(7xy)-y(-y)=49x^{2}y^{2}-7xy^{2}-7xy^{2}+y^{2}=49x^{2}y^{2}-14xy^{2}+y^{2}$
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