College Algebra (11th Edition)

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: 63



Work Step by Step

Use the FOIL method to multiply the binomials. $i(9+12i-12i-16i^2)$ Substitute $-1$ for $i^2$. Also, add/subtract like terms. $i(9-16(-1))$ Simplify. $25i$
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