Algebra: A Combined Approach (4th Edition)

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

Chapter 5 - Section 5.6 - Special Products - Exercise Set: 33

Answer

$9x^{2}-42xy+49y^{2}$

Work Step by Step

$(3x-7y)^{2}$ Apply the formula for squaring a binomial, which is $(a-b)^{2}=a^{2}-2ab+b^{2}$ Here, $a=3x$ and $b=7y$: $(3x-7y)^{2}=(3x)^{2}-2(3x)(7y)+(7y)^{2}=9x^{2}-42xy+49y^{2}$
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