| (x-5)(x-3) | x^2-8x+15 |
| (x+3)(x-3) | x^2-9 |
| (x-7)(x+3) | x^2-4x-21 |
| (x+5)(x+1) | x^2+6x+5 |
| (x-7)(x-3) | x^2-10x+21 |
| (x+9)(x+11) | x^2+20x+99 |
| (x+5)(x+4) | x^2+9x+20 |
| (x-5)(x+6) | x^2+x-30 |
| (x-10)(x+1) | x^2-9x-10 |
| (x-3)(x-1) | x^2-4x+3 |
| (x-6)(x-6) | x^2-12x+36 |
| (x+6)(x+6) | x^2+12x+36 |
| (2x-5)(2x+5) | 4x^2-20x+25 |
| (2x-3)(2x+4) | 4x^2+2x-12 |
| (2x-1)(2x-9) | 4x^2-20x+9 |
| (2x-3)(2x+3) | 4x^2-9 |
| (2x-7)(2x+6) | 4x^2-2x-42 |
| (2x+3)(2x+3) | 4x^2+12x+9 |
| (2x-4)(2x+6) | 4x^2+4x-24 |