Answer
$12i$
Work Step by Step
Multiply the numerator and denominator by the conjugate of the complex imaginary number.
$\frac{12i}{-i}\times\frac{i}{i}$
Expand.
$\frac{12i}{-i^2}$
Remember that $i^2=-1$.
$\frac{12i}{1}$
Simplify.
$12i$
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter 1 - Section 1.3 - Complex Numbers - 1.3 Exercises - Page 103: 78
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