2 - x doesn't factor since nothing has been multiplied to create it.
It is not clear what you mean by x^2 minus "factor x". Please add more information and resubmit.
(x + 2)(x - 4)
(x + 2)(x - 9)
(x + 2)(x - 2)
(x - 2)(x^2 + x + 3)
10x^2 - x - 2 = (5x + 2)(2x - 1)
x(x - 2)
3x2-x-2 = (3x+2)(x-1)
(x - 2)(2x + 3)
What is the question? Do you want to factor 3x2 -x -2? If that is the question the answer is (3x + 2)(x-1)
(x2 + 1)(x2 - 2)
(x-3)(x+2)