Question

What is the solution of the equation x2 = 64?
+8
8
+4
4

Answer 1

I think the answer is 8..

Answer 2

x=±8

Explanation:

The square root of a positive number has a negative and positive real root.

Therefore:

x²=64

x=√64

x=±8

Let's check:

(-8)²=-8*-8=64 works

(8)²=8*8=64 works