1 |
x-2 |
1-x |
2-x |
(a+1)(a-2) |
a2-4a+4 |
2a |
2a-a2 |
a+1 |
a-2 |
a+1 |
a-2 |
1 |
1-a |
a+1 |
a-2 |
a+1 |
a-2 |
a-2 |
a+1 |
1 |
1-a |
a-2 |
a+1 |
a+2 |
1-a2 |
3+2 |
1-9 |
3 |
8 |
m |
x-2 |
3 |
2-x |
x |
x-1 |
3 |
x2-1 |
3 |
x-4 |
1-x |
4-x |
A.4 | B.-4 | C.±4 | D.无解 |
3 |
x-2 |
1-x |
2-x |
x |
x-1 |
6 |
x2-1 |
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