Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 10 - Test: 28

Answer

40

Work Step by Step

Step 1: $(6-2i)(6+2i)$ Step 2: $6(6+2i)-2i(6+2i)$ Step 3: $36+12i-12i-4i^{2}$ Step 4: $36-4i^{2}$ Step 5: Since $i^{2}=-1$, the expression becomes $36-4(-1)$ which is equal to 40
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