Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 8 - Radical Functions - Chapter Test: 31

Answer

$-25.875-19.875i$

Work Step by Step

$(1.5-4.5i)(2.25-6.5i)$ =$1.5(2.25-6.5i)-4.5i(2.25-6.5i)$ =$3.375-9.75i-10.125i+29.25i^{2}$ =$3.375-19.875i+29.25(-1)$ =$3.375-19.875i-29.25$ =$-25.875-19.875i$
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