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: 30

Answer

$25b^{2}-40b+16$

Work Step by Step

$(5b-4)^{2}$ Appy the formula for squaring a binomial, which is $(a-b)^{2}=a^{2}-2ab+b^{2}$ Here, $a=5b$ and $b=4$ $(5b-4)^{2}=(5b)^{2}-2(5b)(4)+4^{2}=25b^{2}-40b+16$
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