| 3 |
| a+b |
| a2+2ab+b2 |
| b2-ab |
| a2-b2 |
| a+b |
| (a+b)2 |
| b(a-b) |
| (a+b)(a-b) |
| 1 |
| a+b |
| b |
| a+b |
| b+1 |
| a+b |
| 3 |
| 1+2 | ||
|
| 3 |
| 3 |
| x+1 |
| x-2 |
| x-2 |
| x-1 |
| 4x2-5x |
| x2-4 |
| 1 |
| x-1 |
| x |
| x-2 |
| x |
| x+2 |
| 4x |
| x-2 |
| 1 |
| a |
| 1 |
| b |
| 2 |
| a+b |
| ab |
| a2-b2 |
| x+2 |
| x2-2x |
| x |
| x-2 |
| 2 |
| x |
| 1 |
| ab+a+1 |
| 1 |
| bc+b+1 |
| 1 |
| ac+c+1 |
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