Question

What are the solution(s) of x2-4-0?
X= 4 or X=4
X=-2 or x= 2
x=2
x=4

Answer 1

Explanation:

First you add 4 on both sides

X^2=0

Then you take square on both sides

X=+- the square root of 4

Simplify that

X=plus or minus 2

The answer can be either -2 or +2 (which is just 2)