#### Answer

$9x^2$

#### Work Step by Step

RECALL:
$u^2=u(u)$
Use the rule above to obtain:
$$(3x)^2=(3x)(3x) =9x^2$$

Published by
Pearson

ISBN 10:
0-32184-874-8

ISBN 13:
978-0-32184-874-1

$9x^2$

RECALL:
$u^2=u(u)$
Use the rule above to obtain:
$$(3x)^2=(3x)(3x) =9x^2$$

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