Answer
45
Work Step by Step
To evaluate $5x^2$ when x=3, plug 3 in for x.
$5(3)^2$ Evaluate the exponent.
$5(9)$ Multiply.
$45$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 10 - Review - Page 727: 9
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