x2-2x |
x2-4 |
2x-4 |
x+2 |
2 |
x2-2x |
x2-4 |
x2-4-2x+4 |
x+2 |
x |
x+2 |
x2-2x |
x+2 |
x2-x |
x+2 |
2 |
(2+
| ||||
2+
|
4
| ||
7 |
1 |
a-1 |
a |
a2-2a+1 |
A.a+1 | B.
| C.
| D.a-1 |
2a+1 |
a2-1 |
1 |
1-a |
2 |
x2+y2 |
x-y |
2xy |
y-x |
2 |
2 |
a2+b2 |
a2-b2 |
a-b |
a+b |
a-b |
2ab |
A.
| B.
| C.a-b | D.a+b |
1 |
a-b |
1 |
b+a |
ab |
a+b |
2 |
2 |
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