#### Answer

$-2b^3\sqrt {5a}$

#### Work Step by Step

$-\sqrt {20ab^6}=-\sqrt {4b^6}\sqrt {5a}=-2b^3\sqrt {5a}$

Published by
Pearson

ISBN 10:
0321726391

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

$-2b^3\sqrt {5a}$

$-\sqrt {20ab^6}=-\sqrt {4b^6}\sqrt {5a}=-2b^3\sqrt {5a}$

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