Answer
$-8$
Work Step by Step
$-\sqrt {64}$
According to the textbook, a number, $a$, is a square root of another number, $b$, if $a^2=b$. Since $8^2=64$, $8$ is a square root of $64$.
Given this, we can deduce that: $-\sqrt {64}=-8$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-2 Quadratic Functions - Mixed Review - Page 546: 52
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