#### Answer

$3r\sqrt 2$

#### Work Step by Step

$\sqrt{ 6}r\sqrt {3r}=\sqrt {(6r)(3r)}=\sqrt {18r^2}=3r\sqrt 2$

Published by
Pearson

ISBN 10:
0-13446-914-3

ISBN 13:
978-0-13446-914-0

$3r\sqrt 2$

$\sqrt{ 6}r\sqrt {3r}=\sqrt {(6r)(3r)}=\sqrt {18r^2}=3r\sqrt 2$

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