2 |
x-3 |
3 |
x-2 |
x2-3 |
x |
10x |
x2-3 |
x2-3 |
x |
A.y+
| B.y+
| C.10y+
| D.y+10y2=7 |
1 |
x2 |
1 |
x |
1 |
x |
A.-2 | B.1 | C.-1或2 | D.-2或1 |
2 |
x-1 |
1 |
x-2 |
1 |
x-1 |
A.x=1 | B.x=0 | C.x1=1,x2=0 | D.x1=-1,x2=0 |
x |
x-1 |
x |
x-1 |
x |
x-1 |
A.y2+5y+6=0 | B.y2-5y+6=0 | C.y2+5y-6=0 | D.y2-5y-6=0 |
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