#### Answer

$10x\sqrt {5x}$

#### Work Step by Step

$3\sqrt {45x^3}+x\sqrt {5x}$ Factor.
$3\sqrt {9x^2}\cdot\sqrt {5x}+x\sqrt 5x$ Use the product rule and simplify.
$9x\sqrt {5x}+x\sqrt 5x$ Combine like radicals.
$10x\sqrt {5x}$

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$10x\sqrt {5x}$

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