Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 9 - Roots and Radicals - 9.1 - Roots and Radicals - Problem Set 9.1: 88

Answer

The answer is below.

Work Step by Step

A negative number times a negative number is a positive number. Thus, there is no number that can be multiplied by itself to get -4. For this reason, the square root of -4 is not a real number.
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