2 |
a-1 |
a-2 |
a2-1 |
a |
a+1 |
2 |
a-1 |
a-2 |
a2-1 |
a |
a+1 |
2(a+1) |
(a-1)(a+1) |
a-2 |
(a+1)(a-1) |
a |
a+1 |
2a+2+a-2 |
(a+1)(a-1) |
a+1 |
a |
3 |
a-1 |
2a+2 |
a |
a2+2a+1 |
a2 |
a |
a+1 |
a-1 |
a2-4a+4 |
a+2 |
a2-2a |
4 |
a |
|
x |
x2-x |
x2-4x+4 |
x2-1 |
|
a2+b2 |
a2-b2 |
a-b |
a+b |
2ab |
(a-b)(a+b)2 |
a2+1 |
a |
a4+a2+1 |
a2 |
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