EDIT: Ahh I thought he was saying that he had factorized/simplified the left side into the right and it wasnt making any sense.
2x + 1 = x + 2sqrt(x) + 1 x = 2sqrt(x) x^2 = 4x x^2 - 4x = 0 x(x - 4) = 0 x = 0 or 4