Question

What are the square roots of 324?

A.
162 and –162

B.
19 and –19

C.
18 and –18

D.
16 and –16

Answer 1

Supposing you do not have a calculator, try making your own table of squares, like this:

x x^2
5 25
9 81
11 121

Answer 2

If 324 is a perfect square, your table will tell you that immediately.

Note that 324, as a square, has two square roots: one positive and one negative.

Answer 3

the answer is C