Answer
$53i$
Work Step by Step
Use the FOIL method to multiply the binomials.
$i(4-14i+14i-49i^2)$
Substitute $-1$ for $i^2$. Also, add/subtract like terms.
$i(4-49(-1))$
Simplify.
$53i$
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: 64
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