Algebra: A Combined Approach (4th Edition)

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

Chapter 12 - Cumulative Review: 37

Answer

$13-18i$

Work Step by Step

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