## Algebra: A Combined Approach (4th Edition)

Published by Pearson

# Chapter 10 - Section 10.7 - Complex Numbers - Vocabulary and Readiness Check: 8

#### 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, $i\times\sqrt 49$= $i\times7$ = $7i$

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