Algebra: A Combined Approach (4th Edition)

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

Chapter 5 - Review: 105

Answer

$25x^2-90x+81$

Work Step by Step

A binomial squared is equal to the square of the first term plus or minus twice the product of both terms plus the square of the second term. $(a - b)^2= a^2 - 2ab + b^2$ $(5x-9)^2=(5x)^2-2(5x)(9)+9^2=25x^2-90x+81$
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