Answer
7j
Work Step by Step
We have
$$\sqrt{-49}=\sqrt{(-1)(49)}=\sqrt{-1} \sqrt{49}=7j.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 11 - Section 11.5 - Imaginary Numbers - Exercise - Page 378: 1
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