2 |
3x-1 |
3 |
6x-2 |
12 |
x2-9 |
2 |
3-x |
1 |
x+3 |
1 |
2 |
1 |
2 |
1 |
2 |
12 |
(x+3)(x-3) |
2 |
x-3 |
1 |
x+3 |
8 |
4-x2 |
2 |
2-x |
A.x=-2 | B.x=2 | C.x=4 | D.无解 |
x |
x-4 |
a |
x-4 |
A.4 | B.2 | C.1 | D.0 |
x |
x-1 |
2 |
x |
2 |
x+1 |
3 |
x-1 |
1 |
x2-1 |
5 |
2 |
5 |
2 |
5 |
2 |
3 |
x-1 |
x+2 |
x(x-1) |
1-x |
x-2 |
1 |
2-x |
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