Question

What is the principal square root of 64?
A. -8
B. 8
C. 4
D. -4

Answer 1

B. 8

Explanation:

The principal square root is another word for the positive square root. The square root of a number is the number that equals a given number when multiplied by itself.

In this case, 8*8 = 64. -8*-8 also equals 64, but we are looking for the principal square root here, so the only answer is 8.

Hope this helps!