Algebra: A Combined Approach (4th Edition)

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

Chapter 10 - Section 10.7 - Complex Numbers - Exercise Set: 41

Answer

$18 + 3i$

Work Step by Step

$(4 + i)(5 + 2i) = 20 + 8i + 5i + 2i^2 = 20 + 13i + 2(-1) = 18 + 13i$
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