Trigonometry (10th Edition)

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: 69

Answer

$10$

Work Step by Step

Step 1: $(3+i)(3-i)$ Step 2: $3(3-i)+i(3-i)$ Step 3: $9-3i+3i-i^{2}$ Step 4: $9-(-1)$ Step 5: $9+1$ Step 6: $10$
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