| x^2+6x+8 | (x+2)(x+4) |
| x^2-2x-8 | (x-4)(x+2) |
| x^2-2x-15 | (x-5)(x+3) |
| x^2+2x-15 | (x+5)(x-3) |
| x^2-x-30 | (x-6)(x+5) |
| x^2+4x-21 | (x+7)(x-3) |
| x^2-7x+12 | (x-3)(x-4) |
| 2x^2+3x+1 | (2x+1)(x+1) |
| 3x^2-5x+2 | (3x-2)(x-1) |
| 10x^2+7x+1 | (5x+1)(2x+1) |
| x^2+6x+5 | (x+1)(x+5) |
| x^2-10x+16 | (x-8)(x-2) |
| 3x^2-4x-4 | (3x+2)(x-2) |
| x^2+9x+18 | (x+3)(x+6) |
| x^2+2x-8 | (x+4)(x-2) |