Answer
$16x^{2}+72x+81$
Work Step by Step
$(4x+9)^{2}$
Special product: $a^{2}+2ab+b^{2}$
Substitute: $a=4x$ and $b=9$
$(4x)^{2}+2(4x)(9)+(9)^{2}$
Simplify
$16x^{2}+72x+81$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Review - Page 330: 72
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