Answer
$22-7i$
Work Step by Step
We simplify:
$(3+2i)(4-5i)$
We distribute:
$12-15i+8i-10i^{2}$
We know that $i^2=-1$:
$12-7i-10*-1$
$12+10-7i$
$22-7i$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 3 - Section 3.4 - Library of Functions; Piecewise-defined Function - 3.4 Assess Your Understanding - Page 247: 72
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