Answer
$-7+22i$
Work Step by Step
$z_{1}z_{3}$
=$(2+3i)(4+5i)$
=$2(4+5i)+3i(4+5i)$
=$8+10i+12i+15i^{2}$
=$8+22i+15(-1)$
=$-7+22i$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 8 - Section 8.1 - Complex Numbers - 8.1 Problem Set - Page 426: 77
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
