Answer
$8i$
Work Step by Step
Step 1: $\sqrt (-64)$
Step 2: $\sqrt (-1\times64)$
Step 3: $\sqrt -1 \times \sqrt 64$
Step 4: Since $\sqrt -1=i$ and $\sqrt 64=8$, the expression becomes $i\times8$
Step 5: Simplifying, the final answer is $8i$
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: 13
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