Answer
$\sqrt{-1}$; $-\text{ }1$
Work Step by Step
RECALL:
(1) $i =\sqrt{-1}$
(2) $i^2=\sqrt{-1}^2 = -1$
Thus, the missing expressions in the given statement are: $\sqrt{-1}$ and $-1$, respectively.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 7 - Section 7.7 - Complex Numbers - Concept and Vocabulary Check - Page 569: 1
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