The answer to x2 - 2x - 4y2 - 4y =(x - 2y)(x - 2y - 2)
4(x+y)^2
x(x-1)
(x + 2)(x - 4)
(x + 2)(x - 9)
(x - 5)(x + 3)
(x + 1)(x - 8)
x(x - 7)
x(x - 2)
It is not clear what you mean by x^2 minus "factor x". Please add more information and resubmit.
There are no rational factors.
x(x + 3)(x - 4)