#### Answer

$i\sqrt 7$

#### Work Step by Step

Step 1: $\sqrt -7$= $\sqrt -1\times\sqrt 7$
Step 2: Since $\sqrt -1=i$, the expression becomes $i\times\sqrt 7$
Step 3: $i\times\sqrt 7$ = $i\sqrt 7$
Step 4: No further simplification is possible

Published by
Pearson

ISBN 10:
0321726391

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

$i\sqrt 7$

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