#### Answer

$5b\sqrt{b}$

#### Work Step by Step

$\sqrt{9b^3}-\sqrt{25b^3}+\sqrt{49b^3}$ Factor.
$\sqrt{9b^2}\sqrt{b}-\sqrt{25b^2}\sqrt{b}+\sqrt{49b^2}\sqrt{b}$ Simplify.
$3b\sqrt{b}-5b\sqrt{b}+7b\sqrt{b}$ Combine like radicals.
$5b\sqrt{b}$

Published by
Pearson

ISBN 10:
0321726391

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

$5b\sqrt{b}$

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