Answer
True
Work Step by Step
$i$ is defined as $\sqrt {-1}$
Therefore, $i^2=i\times i=\sqrt {-1}\times\sqrt {-1}=-1$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 11 - Additional Topics - 11.4 - Complex Numbers - Concept Quiz 11.4 - Page 493: 7
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