| 1 |
| 1+a |
| 1 |
| 1+b |
| a |
| 1+a |
| b |
| 1+b |
| 1 |
| 6 |
| 1 |
| 2×3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 12 |
| 1 |
| 3×4 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 20 |
| 1 |
| 4×5 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 30 |
| 1 |
| 5×6 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 42 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| (x-2)(x-3) |
| 2 |
| (x-1)(x-3) |
| 1 |
| (x-1)(x-2) |
| 1 |
| 1-x |
| y2 |
| x |
| x |
| x2-1 |
| 1 |
| x+1 |
| A |
| x-2 |
| B |
| x+1 |
| 3 |
| (x+1)(x-2) |
| 2y |
| x |
| 3x |
| y |
| 1 |
| x+2 |
| 1 |
| x+1 |
| 1 |
| 2m-4 |
| 2 |
| m2-4 |
| 3 |
| x+2 |
| 5 |
| x-2 |
| 2x |
| x2-4 |
| 3x-4 |
| (x-1)(x-2) |
| A |
| x-1 |
| B |
| x-2 |
| A(x-2)+B(x-1) |
| (x-1)(x-2) |
|
|
| x+3 |
| (x-2)2 |
| A |
| x-2 |
| B |
| (x-2)2 |