2x |
2x-1 |
5 |
1-2x |
7 |
x2+x |
3 |
x2-x |
6 |
x2-1 |
2x |
2x-1 |
5 |
2x-1 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
7 |
x(x+1) |
3 |
x(x-1) |
6 |
(x+1)(x-1) |
40 |
x |
4 |
3 |
40 |
3x |
2x-5 |
x-2 |
3 |
2-x |
A.x=-2 | B.x=2 | C.x=1 | D.x=1或x=2 |
1 |
b |
1 |
a |
A.
| B.
| C.
| D.-
|
4-2x |
4-x |
x-5 |
x-4 |
2 |
x-2 |
ax |
x2-4 |
3 |
x+2 |
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