100 |
x |
30 |
x-7 |
a-1 |
a |
a2-1 |
a2+2a |
a-1 |
a |
a2-1 |
a2+2a |
a+2 |
a+1 |
-1 |
a+1 |
-1 |
2+1 |
1 |
3 |
3-x |
x |
1 |
x-2 |
3 |
x |
1-x |
2-x |
1 |
x-2 |
x |
x-6 |
x-2 |
x-3 |
1 |
x |
1 |
2 |
1 |
2 |
1 |
x |
1 |
3 |
1 |
3 |
1 |
x+1 |
1 |
b+1 |
A.x1=b或x2=
| B.x1=b或x2=
| ||||
C.x1=b+1或x2=
| D.x1=b或x2=-
|
3 |
x-1 |
x+6 |
x(x-1) |
1 |
y-2 |
1-y |
2-y |
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