2x^2-5x-12
(y-6)(y-4)
2x^2-x-10
(20 x y+16-4y)
9a^2-3a-20
(x+3x)(+10)
3y^2-11y +8
(x+3)(x-3)
(x+3)(x+10)=x^2+30
(3a-5)(3a+4)
(2x-5)(x-5)
(2x+3)(x-4)
(y-6)(y-4)=y^2+24
(x+3)(x-3=x^2-9
5y+4x-y
