| 3x-g |
| xy |
| 的y |
| 3x的(y-x) |
| 1 |
| xx-yx |
| xxy |
| xx-xy |
| 1 |
| x2-1 |
| x-1 |
| x2-x |
| 1 |
| x2+x+1 |
| a |
| a2-4a+4 |
| b |
| 4a2-8a+4 |
| c |
| 3a-6 |
| 2c |
| 3a2b2 |
| -3a |
| 4b4c |
| 5b |
| 2a2c |
| 2 |
| 9-3a |
| a-1 |
| a2-9 |
| 2(a+3) |
| 3(a+3)(a-3) |
| 3(a-1) |
| 3(a+3)(a-3) |
| 2(a+3) |
| 3(a+3)(a-3) |
| 3(a-1) |
| 3(a+3)(a-3) |
| 3 |
| 4xy |
| 2 |
| x2(x-y) |
| 1 |
| 2x-2y |
| 1 | ||
4
|
| b |
| 2ac |
| 2 |
| a+3 |
| 5a |
| a2-9 |
| b |
| 2a |
| a |
| 2b2 |
| 1 |
| 4ab |