#### Answer

$2\sqrt 10$

#### Work Step by Step

Step 1: $\sqrt 40$
Step 2: $\sqrt (4\times10)$
Step 3: $\sqrt 4\sqrt 10$
Step 4: $2\sqrt 10$

Published by
Pearson

ISBN 10:
0321726391

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

$2\sqrt 10$

Step 1: $\sqrt 40$
Step 2: $\sqrt (4\times10)$
Step 3: $\sqrt 4\sqrt 10$
Step 4: $2\sqrt 10$

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