Answer
$$8-5i$$
Work Step by Step
Combining like terms, we find:
$$5+4i+3-9i \\ 8-5i$$
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 9 - Trigonometric Identities, Models, and Complex Numbers - Review Exercises and Problems for Chapter Nine - Page 394: 13
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