2x |
2x-1 |
5 |
1-2x |
x |
x-1 |
x-2 |
x2-x |
-b±
| ||
2a |
5±
| ||
4 |
5+
| ||
4 |
5-
| ||
4 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
x-2 |
1 |
2-x |
A.x=1 | B.x=2 | C.无解 | D.x=4 |
x-2 |
2x-3 |
2 |
3-2x |
A.x=1.5 | B.x=4 | C.x=0 | D.无解 |
x |
2x-5 |
5 |
5-2x |
3x |
x+1 |
m |
x+1 |
A.-1 | B.-3 | C.0 | D.-2 |
1 |
a |
1 |
b |
A.
| B.1 | C.-1 | D.-
|
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