Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 7 - Section 7.7 - Complex Numbers - Exercise Set - Page 570: 37



Work Step by Step

RECALL: (1) $a(b-c) = ac - bc$ (2) $i^2=-1$ Use rule (1) above to obtain: $=-7i(2) - (-7i)(5i) \\=-14i - (-35i^2) \\=-14i+35i^2$ Use rule (2) above to obtain: $=-14i +35(-1) \\=-14i +(-35) \\=-35-14i$
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