Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 10 - Section 10.7 - Complex Numbers - Practice - Page 734: 5



Work Step by Step

Step 1: $\sqrt −25×\sqrt -1$ Step 2: As $\sqrt -1=i$, the expression becomes $i\sqrt 25\times i$ Step 3: Since $i^{2}=-1$, the expression becomes $−\sqrt 25$ Step 4: Simplifying, the expression becomes $−5$
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