5 |
m |
2 |
1 |
x |
1 |
3 |
x2-1 |
A.2个 | B.3个 | C.4个 | D.5个 |
5 |
m |
2 |
1 |
x |
1 |
3 |
x2-1 |
A.5、6、-8 | B.5,-6,-8 | C.5,-6,8 | D.6,5,-8 |
A.x2=0 | B.x2-5x=(x-2)2 | ||
C.
| D.(a-1)x2+bx+c=0 |
2 |
x2+5 |
x |
3 |
A.2x2-3xy+4=0 | B.x2-6x-1+7=0 |
C.3(x+1)2=2(x+1) | D.ax2+bx+c=0 |
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