Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 7 - Section 7.7 - Complex Numbers - Exercise Set - Page 463: 53

Answer

-3i(-1+9i) = 27+3i

Work Step by Step

Directions: Perform each indicated operation. Write the result in the form a+bi. -3i(-1+9i) 3i-27$i^{2}$ Distribute -3i 3i+27 i=$\sqrt -1$, therefore $i^{2}$=$\sqrt -1$ ⋅ $\sqrt -1$= -1 27+3i Rewrite in form a+bi
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