Answer
$a^2-20a+100$
Work Step by Step
RECALL:
$(a-b)^2=a^2-2ab+b^2$
Using the formula above with $a=a$ and $b=10$, the given expression is equivalent to:
$=a^2-2(a)(10)+10^2
\\=a^2-20a+100$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 4 - Polynomials - 4.6 Special Products - 4.6 Exercise Set - Page 276: 28
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