Answer
-8
Work Step by Step
$-64^{\frac{1}{2}}=-(\sqrt 64)=-(8)=-8$
Since the negative sign is not in parentheses with the 64, we only apply the exponent to the 64. In this case, we are taking the opposite of $\sqrt 64$.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 7 - Section 7.2 - Rational Exponents - Exercise Set - Page 424: 14
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