| 1 |
| x |
| 得 |
| 2 |
| 得x+x2+2 |
| 8x-3x2+42 |
| 0xy0 |
| x+y |
| xy3 |
| x0-y0 |
| 1 |
| 0(x-y) |
| 1 |
| 0 |
| 0 |
| 3 |
| x0-4x |
| x+3 |
| 4-x |
| x |
| x2-4x+4 |
| 2x-4 |
| 5 |
| 4 |
| x-3 |
| x-1 |
| x2-3x |
| 3 |
| x2+x |
| x2-我 |
| x+我 |
| x-我 |
| x2 |
| x-1 |
| 2x |
| 1-x |
| 2 |
| x-1 |
| 1 |
| a2-4a+4 |
| a |
| a2-4 |
| 1 |
| 2a+4 |
| x2 |
| x-y |
| y2 |
| x-y |
| ||||
| 0.4x-0.5 |
| a+b |
| 2ab2 |
| a2-b2 |
| ab3 |
| 5 |
| 2(a-b) |
| 5 |
| 2 |
| 2 |
| 3 |
| x+y |
| x-y |
| 4xy |
| y2-x2 |
| x2+2xy-8y2 |
| x2-9y2 |