A.x=
| B.x=-
| ||||
C.x=0 | D.x1=0,x2=-
|
|
3 |
2 |
A.k≤2且k≠1 | B.k<2且k≠1 | C.k≤2 | D.k<2 |
A.x2+
| B.(x-1)(x+2)=1 | ||
C.ax2+bx+c=0 | D.、3x2-2xy-5y2=0 |
A.3,-4,-5 | B.3,-4,5 | C.3,4,5 | D.3,4,-5 |
A.3,-4,-7 | B.3,-4,7 | C.3,4,7 | D.3,4,-7 |
A.-2 | B.2 | C.-3 | D.-1 |
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