Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 10 - Exponents and Radicals - 10.8 The Complex Numbers - 10.8 Exercise Set: 17

Answer

-7i

Work Step by Step

To express in terms of $i$ simply divide the number under the radical by -1 and write i as a multiplier. $-\sqrt 49$$=-7$. Thus the answer is -7i.
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