Trigonometry 7th Edition

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: 58

Answer

$10-10i$

Work Step by Step

Step 1: $(2-4i)(3+i)$ Step 2: $2(3+i)-4i(3+i)$ Step 3: $6+2i-12i-4i^{2}$ Step 4: $6+2i-12i-4(-1)$ Step 5: $6+4+2i-12i$ Step 6: $10-10i$
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