Answer
$25x^2+90x+81$
Work Step by Step
$(5x+9)^2=(5x)^2+2\cdot9\cdot 5x+9^2=25x^2+90x+81$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 10 - Section 10.3 - Multiplying Polynomials - Exercise Set - Page 717: 34
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