Answer
$(s-10)^{2}$
Work Step by Step
$s^{2}-20s+100=$
...write last term as a square.
$=s^{2}-20s+10^{2}$
...does middle term equal $2ab$?
$-20s=-2(s)(10)$
yes,
$=s^{2}-2(s)(10)+10^{2}$
...write as the square of a binomial.
$=(s-10)^{2}$
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 8 - Polynomials and Factoring - Chapter Review - Page 538: 59
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