#### Answer

$\frac{\sqrt {55mn}}{11n}$

#### Work Step by Step

$\sqrt \frac{5m}{11n}$
=$\frac{\sqrt {5m}}{\sqrt {11n}}\times\frac{\sqrt {11n}}{\sqrt {11n}}$
=$\frac{\sqrt {5m\times11n}}{\sqrt {11n}\times\sqrt {11n}}$
=$\frac{\sqrt {55mn}}{11n}$

Published by
Pearson

ISBN 10:
0321726391

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

$\frac{\sqrt {55mn}}{11n}$

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