Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 8 - Radical Functions - 8.5 Complex Numbers - 8.5 Exercises: 4

Answer

$4i$

Work Step by Step

Step 1: $\sqrt {-16}$ Step 2: $\sqrt {-1}\times\sqrt {16}$ Step 3: As $\sqrt {-1}=i$, the expression becomes $i\times\sqrt {16}$. Step 4: $i\times\sqrt {16}=i\times4=4i$
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