3 |
3 |
3 |
3 |
2a2+2b2+2c2-2ab-2bc-2ca |
2 |
(a2-2ab+b2)+(b2-2bc+c2)+(c2-2ca+a2) |
2 |
(a-b)2+(b-c)2+(a-c)2 |
2 |
(2+
| ||||
2 |
4+3+4
| ||||
2 |
x2+2009 |
y2+2009 |
x+2008y |
2008x+y |
1 | ||
|
2 |
1 | ||||
|
3 |
2 |
1 | ||||
|
4 |
3 |
1 | ||||
|
5 |
4 |
1 | ||||
|
1 | ||||
|
1 | ||||
|
1 | ||||
|
2007 |
1 | ||
|
2 |
1 | ||||
|
3 |
2 |
1 | ||||
|
4 |
3 |
1 | ||||
|
1 | ||||
|
1 | ||||
|
1 | ||||
|
2008 |
2 |
|
| ||
3
|
3 | ||
|
2 | ||||
|
x-y | ||||
|
x-2+
| ||
x+2+
|
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