1 |
5-x |
2 |
2-3x |
A.-2.4 | B.
| C.-8 | D.2.4 |
1 |
5-x |
2 |
2-3x |
2-x |
x-3 |
2 |
3-x |
1-x |
x-2 |
1 |
2-x |
1 |
x-1 |
2 |
x2-1 |
x-2 |
x+2 |
x+2 |
x-2 |
16 |
x2-4 |
2-x |
x-3 |
1 |
3-x |
7 |
x2+x |
1 |
x2-x |
6 |
x2-1 |
x |
x-1 |
2x-2 |
x |
5x-4 |
2x-4 |
1 |
2 |
2x-5 |
3x-6 |
x |
x-3 |
k |
x-3 |
A.3 | B.0 | C.±3 | D.无法确定 |
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