Answer
$0$
Work Step by Step
Step 1: $(4-7i)-(4-7i)$
Step 2: $4-7i-4+7i$
Step 3: $4-4-7i+7i$
Step 4: $0$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
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 - Page 663: 42
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