Answer
$-64$
Work Step by Step
Substituting $x=-8$ into the expression $-x^{2}$, we obtain:
$-x^{2}=-(-8)^{2}=-(-8\times-8)=-(64)=-64$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 2 - Real Numbers - 2.4 - Exponents - Problem Set 2.4 - Page 76: 99
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