a-1 |
a |
2a-1 |
a |
2 |
3 |
x |
3x-1 |
1 |
9x-3 |
a-1 |
a |
a |
(a-1)2 |
1 |
a-1 |
1 |
3 |
1 |
3 |
x-1 |
x |
1-x |
x+1 |
5x-5 |
2x+2 |
x-1 |
x |
x-1 |
x+1 |
5(x-1) |
2(x+1) |
1 |
x |
1 |
x+1 |
5 |
2(x+1) |
x-3 |
4-x |
1 |
x-4 |
2x |
x-2 |
3m |
2-x |
3 |
x-1 |
x+2 |
x(x-1) |
x |
x-3 |
3 |
x-3 |
A.1个 | B.2个 | C.3个 | D.4个 |
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