| 1 |
| 0 |
| 9 |
| 4 |
| x+3 |
| x |
| x+1 |
| 七 |
| 2 |
| 9 |
| 七 |
| 2 |
| 七 |
| 2 |
| 4 |
| x+3 |
| x |
| x+七 |
| 2x+6-4 |
| x+3 |
| x |
| x+七 |
| 2x+2 |
| x+3 |
| x |
| x+七 |
| (2x+2)(x+七)-x(x+3) |
| (x+3)(x+七) |
| 2x2+4x+2-x2-3x |
| (x+3)(x+七) |
| x2-x+2 |
| (x+3)(x+七) |
| (x-2)(x+七) |
| (x+3)(x+七) |
| x-2 |
| x+3 |
| 七 |
| 2 |
| 9 |
| 七 |
| 2 |
| 七 |
| 2 |
| 4 |
| x+3 |
| x |
| x+七 |
| 2x+6-4 |
| x+3 |
| x |
| x+七 |
| 2x+2 |
| x+3 |
| x |
| x+七 |
| (2x+2)(x+七)-x(x+3) |
| (x+3)(x+七) |
| 2x2+4x+2-x2-3x |
| (x+3)(x+七) |
| x2-x+2 |
| (x+3)(x+七) |
| (x-2)(x+七) |
| (x+3)(x+七) |
| x-2 |
| x+3 |