Answer
$7i$
Work Step by Step
Step 1: $\sqrt -49$= $\sqrt -1\times\sqrt 49$
Step 2: Since $\sqrt -1=i$, the expression becomes $i\sqrt 49$
Step 3: Simplifying further, $i\times\sqrt 49$= $i\times7$ = $7i$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 10 - Section 10.7 - Complex Numbers - Vocabulary and Readiness Check - Page 739: 8
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