Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - 1.3 Complex Numbers - 1.3 Exercises: 11

Answer

real number complex number;

Work Step by Step

$-4$ is known to be a real number. RECALL: The number $a+bi$ where $a$ and $b$ are real numbers is a complex number. Since $-4= -4 + 0i$ and $-4 and 0$ are real numbers, then $-4$ is a complex number. Thus, $-4$ is: a real number; a complex number
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