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: 16

Answer

$2-8i$

Work Step by Step

$\sqrt 4-\sqrt {-64}$ =$2-\sqrt {-1\times64}$ =$2-(\sqrt {-1}\times\sqrt {64})$ =$2-(i\times\sqrt {64})$ =$2-(i\times8)$ =$2-8i$
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