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 $b=7y$:
$(3x-7y)^{2}=(3x)^{2}-2(3x)(7y)+(7y)^{2}=9x^{2}-42xy+49y^{2}$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Section 5.6 - Special Products - Exercise Set - Page 387: 33
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