Answer
$(n-9)^{2}$
Work Step by Step
$n^{2}$-18n+81=$n^{2}$-(2)(n)(9)+$9^{2}$=$(n-9)^{2}$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 6 - Review - Page 474: 38
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