a does NOT equal 1
2x^2-5x-3
(x-3)(2x+1)
x^2+8x+12
(x-6)(x+2)
10x^2-5x-5
5(2x^2-x-1)
x^2-100
(x-10)(x+10)
12x^2+11x-15
(4x-3)(3x+5)
x^2+11x+30
(x+6)(x+5)
8m^2+6m-12m
2m(4m^3+2m-6m)
x^2-64
(x-8)(x+8)
3x^2-29x-240
(x-15)(3x+16)
x^2-2x-15
(x-3)(x+5)
28n^2-32n-8
4(7n^2-13n-2)
x^2-144
(x-12)(x+12)