Answer
$27-36i$
Work Step by Step
Step 1: $(6-3i)(6-3i)$
Step 2: $6(6-3i)-3i(6-3i)$
Step 3: $36-18i-18i+9i^{2}$
Step 4: $36-36i+9(-1)$
Step 5: $36-36i-9$
Step 6: $27-36i$
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 8 - Review Exercises - Page 409: 12
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