Answer
$27+21i$
Work Step by Step
$ 3i(7-9i)\qquad$ ...apply the distributive property.
$=21i-27i^{2}\qquad$ ...simplify. ($i^{2}=-1$)
$=21i+27$
$=27+21i$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 4 Quadratic Functions and Factoring - 4.7 Complete the Square - 4.7 Exercises - Quiz for Lessons 4.5-4.7 - Page 291: 9
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