Answer
$13$
Work Step by Step
Step 1: $(-2-3i)(-2+3i)$
Step 2: $-2(-2+3i)-3i(-2+3i)$
Step 3: $4-6i+6i-9i^{2}$
Step 4: $4-9(-1)$
Step 5: $4+9$
Step 6: $13$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 8 - Complex Numbers, Polar Equations, and Parametric Equations - Section 8.1 Complex Numbers - 8.1 Exercises - Page 358: 71
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