(x - y - z)(x - y + z)
x2 - 4
x2 + 10y + 25 doesn't factor neatly. If that was x2 + 10x + 25, it would factor to (x + 5)(x + 5) or (X + 5)2
x2-3x-28
I assume x2 + 5x - 36 is the polynomial in the question. First, look for two factors of 36 that have a difference of 5, which would be 9 and 4. It would factor into (x + 9)(x - 4). To double check, multiplying them together results in x2 - 4x + 9x - 36 = x2 + 5x - 36. If the polynomial is 5x2 +7x +2
This is not factorable. You would have to do the quadratic formula for this problem.
Assuming the question is written as: x2+11x-12 This would factor to: (x+12)(x-1)
x2 - 4
9 - x2 will factor into (3 - x)(3 + x)
(x2 + 3x + 5)(x2 - 3x + 4)
x2 + 10y + 25 doesn't factor neatly. If that was x2 + 10x + 25, it would factor to (x + 5)(x + 5) or (X + 5)2
x2-14 does factor but not pretty; it factors to: (x+sqrt14)(x-sqrt14).
x2-3x-28
(x + 7)(x2 - 7x + 49)
(x - 7)(x2 + 7x + 49)
x2 + 6x - 2 can not be factored
x2(x3 + 1) is the best you can do there.
x2-9x = x(x-9)