Answer
$-6$
Work Step by Step
Step 1: $3i(1+i)^{2}$
Step 2: $3i(1+i^{2}+2i)$
Step 3: $3i+3i(i^{2})+6i^{2}$
Step 4: $3i+3i(-1)+6(-1)$
Step 5: $3i-3i-6$
Step 6: $-6$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 8 - Section 8.1 - Complex Numbers - 8.1 Problem Set - Page 426: 65
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