x2+1 |
x |
2x |
x2+1 |
-b±
| ||
2a |
-3±
| ||
4 |
-3+
| ||
4 |
-3-
| ||
4 |
x2+1 |
x |
2x |
x2+1 |
x2+1 |
x |
2 |
y |
x2+1 |
x |
x2+1 |
x |
b |
2a |
2 |
x+2 |
2 |
x-1 |
x-1 |
x |
x |
x-1 |
5 |
2 |
A.方程x+
| ||
B.方程x+
| ||
C.方程x+
| ||
D.方程x+
|
(x-1)2 |
x2 |
x-1 |
x |
2x |
x-1 |
2x |
x-1 |
2x |
x-1 |
A.y2+7y+12=0 | B.y2-7y+12=0 | C.y2+7y-12=0 | D.y2-7y-12=0 |
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