(square root of x + 2)- x = 0
(x+2)^2 -x = 0
(x+2)^1/2^2/1 - x + x = 0 + x^2/1
x + 2 - 2 = x^2/1 - 2
x = x^2/1^1/2 - 2
x - x = x - 2
0 + 2 = x - 2 + 2
2 = x