#### Answer

$\frac{5\sqrt {5x}}{9}$

#### Work Step by Step

$\frac{\sqrt {20x}}{9}+\sqrt \frac{{5x}}{9}$
$\frac{2\sqrt {5x}}{9}+\frac{\sqrt {5x}}{3}$ The LCD is 9.
$\frac{2\sqrt {5x}}{9}+\frac{3\sqrt {5x}}{9}$
$\frac{5\sqrt {5x}}{9}$ Add.

Published by
Pearson

ISBN 10:
0321726391

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

$\frac{5\sqrt {5x}}{9}$

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