Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 7 - Section 7.1 - Radicals and Radical Functions - Exercise Set - Page 418: 111


The radical $\sqrt{-64}$ is not a real number because the radicand is a negative number and the index is even. Also, there is no real number such that when it is multiplied to itself will give a negative product.

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