Answer
$(x-9)^2$
Work Step by Step
$x^2-18x+81$
$=x^2-2*x*9+9^2$
$=(x-9)^2$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 9 - Quadratic Functions and Equations - Get Ready! - Page 543: 22
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