If you mean: 4xsquared+40x+100 then divide all terms by 4 which then factors to (x+5)(x+5)
4x2 - 9y Not factorable from what I see.
The GCF is 4x2.
4x2-y2 = (2x-y)(2x+y)
If that's + 4x2, the answer is 2x(x2 + 2x - 4)
4x2+20x+25 (2x+5)^2
4x2-36x+81 (2x-9)(2x-9)
4x2 - 23xy + 15y2 = (4x - 3y)(x - 5y)
You would factor it in this way: 2 * 2 * x * x.
4x
16 - a2
The GCF is 2x.
It is: 4x2-7x-15 when factored is (4x+5)(x-3)