Factor out the GCF and get X(X2-X+1).
(x-1)(x+2)
X squared plus 1 and x minus 1 ---- Actually it is the following: x3-x x(x2-1) x(x+1)(x-1)
(x - 1)(5x + 7)
(x + 6)(x - 6)
x(x-1)
(x + 1)(x - 8)
4(x - 1)(x + 1)
x^2(1 - x)(1 + x)
(x + 3)(x - 1)(x + 1)
Factor out the GCF and get X(X2-X+1).
(x-1)(x+2)
(x-3)(3x+1)
x^2-x+1 cannot be factorised
(x-1)(x-4)
(x-6)(x-1)
2x squared - 5x - 3 = (2x +1)(x -3)