-b+
| ||
2a |
-b-
| ||
2a |
(-b+
| ||||
2a |
-2b |
2a |
b |
a |
(-b+
| ||||
2a•2a |
b2-(b2-4ac) |
4a2 |
c |
a |
1 |
x1 |
1 |
x2 |
x | 21 |
x | 22 |
-6 |
2 |
1 |
2 |
1 |
x1 |
1 |
x2 |
x1+x2 |
x1x2 |
3 | ||
-
|
1 |
2 |
x | 21 |
x | 22 |
A.0 | B.1 | C.2010 | D.2011 |
6 |
A.3 | B.2 | C.-2. | D.-3. |
b |
a |
c |
a |
1 |
x1 |
1 |
x2 |
4 |
x1 |
4 |
x2 |
A.2或-2 | B.2 | C.-2 | D.0 |
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