Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 7 - Section 7.7 - Complex Numbers - 7.7 Exercises: 30

Answer

$4i$

Work Step by Step

$\frac{\sqrt -160}{\sqrt 10}=\frac{i\sqrt 160}{\sqrt 10}=i\sqrt\frac{160}{10}=i\sqrt 16=i\times4=4i$ We know that $\sqrt -1=i$, because $i^{2}=-1$.
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