Algebra: A Combined Approach (4th Edition)

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

Chapter 6 - Cumulative Review: 36



Work Step by Step

$(3x-7y)^{2}$=(3x-7y)(3x-7y)= 3x(3x)+3x(-7y)+(-7y)(3x)+(-7y)(-7y)= 9$x^{2}$-21xy-21xy+49$y^{2}$= 9$x^{2}$-42xy+49$y^{2}$
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