4x^4-16x^2+16
x^4+4x^3+4x^2
9x^6-121
4x^2-16
x^2+2x-24
x^2+x-12
x^2+11x+24
x^2+5x+6
x^2-13x+12
(x+2)·(x+3)
(x+8)·(x+3)
(x+4)·(x-3)
(2x-4)·(2x-4)
x^2·(x+2)·(x+2)
(x-1)·(x-12)
(3x^3-11)·(3x^3+11)
(2x-4)·(2x+4)
(x+6)·(x-4)
