This expression doesn't tell what 'x' has to be. In fact, 'x' can be anything. Your choice.
Every time you change 'x', the expression becomes a different number.
If this expression were equal to something, then we could get some exercise
figuring out what 'x' must be in order to make the equation true. But in its present
form, it doesn't say anything, so there's nothing to be proven true or false. It's just
a number that depends on what 'x' is.
(x+4)(x-7)
x^2 + 3x + 2/(-3x) - x^2 - 2=3x-2+2/(-3x)=3x-2-2/(3x)
x(3x - 2)
(x-3)(3x+1)
It is: (x+5)(x-8) when factored
3x2-x-2 = (3x+2)(x-1)
(3x + 1)(x - 5)
(3x2 - 6x)/3x = 3x(x-2)/3x = x-2, for x<>0
x2 - 3x - 40 = (x - 8) (x + 5)
(x + 3)(3x - 2)
What is the question? Do you want to factor 3x2 -x -2? If that is the question the answer is (3x + 2)(x-1)
3x2 - 8x = x(3x - 8)