Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 11 - Additional Topics - Chapter 11 Review Problem Set - Page 520: 44

Answer

$2-4i$

Work Step by Step

(Recall, we must distribute the negative to everything in the second set of parenthesis.) Adding the real terms together and the imaginary terms together, we obtain: $(6-9i)-(4-5i)$ =$(6-9i)+(-4+5i)$ =$(6-4)+(-9i+5i)$ =$2-4i$
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