Question

If `x^2=9`, then what is the value of x?

Answer 1

`x = +3, x = -3`

Explanation:

In `x^2 =9` , you need to get rid of the power of 2 in order to isolate just `x`

This involves finding the square root. `sqrtx^2 = x`

However there are 2 possible answers to a square root, a positive or a negative answer.

`x = +-sqrt9`

`x = +-3`