x2 |
a2 |
y2 |
b2 |
|
|
x2 |
4 |
y2 |
3 |
t |
s-1 |
-t |
s-4 |
5s-8 |
2s-5 |
3t |
2s-5 |
1 |
2 |
3 |
2 |
(y1+y2)2-4y1y2 |
|
-6m |
3m2+4 |
-9 |
3m2+4 |
|
m2+1 |
(3m2+4)2 |
u |
(3u+1)2 |
1 | ||
9u+
|
1 |
u |
1 |
3 |
1 |
3 |
1 |
u |
1 |
4 |
9 |
2 |
x2 |
a2 |
y2 |
b2 |
| ||
2 |
| ||
a2 |
| ||
|
A.(0,
| B.(
| C.(0,
| D.(
|
2 |
x2 |
a2 |
y2 |
b2 |
a2-b2 |
x2 |
4 |
y2 |
2 |
PF1 |
PF2 |
A.2个 | B.4个 | C.6个 | D.0个 |
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