2x+1 |
x-2 |
2x+1 |
x-2 |
1 |
2 |
1 |
2 |
3 |
4 |
2x+1 |
x-2 |
1 |
2 |
3 |
4 |
1 |
2 |
3 |
4 |
|x|-1 |
x+1 |
A.-1或1 | B.1 | C.-1 | D.1或0 |
1 |
a+2 |
| ||||
8-2x |
8 |
3 |
2 |
3 |
2 |
3 |
x-1 |
x+1 |
x2 |
x-1 |
3 |
x+1 |
2x |
x2+1 |
x-1 |
x+1 |
(x+1)-2 |
x+1 |
2 |
x+1 |
x2 |
x-1 |
x2-1+1 |
x-1 |
(x+1)(x-1)+1 |
x-1 |
1 |
x-1 |
x-1 |
x+2 |
2x-1 |
x+1 |
2x2-1 |
x+1 |
x2-25 |
x-5 |
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