a2-4 |
a2-4a+4 |
1 |
2-a |
2 |
a2-2a |
(a+2)(a-2) |
(a-2)2 |
1 |
a-2 |
a(a-2) |
2 |
a+2 |
a-2 |
1 |
a-2 |
a(a-2) |
2 |
a(a+3) |
2 |
1 |
2 |
1 |
2 |
2 |
2 |
2 |
1 |
a-2 |
1 |
a+2 |
2 |
2-a |
3 |
1 |
1-x |
x2-x+1 |
x2-2x+1 |
3x |
x+1 |
x |
x-1 |
x2-2x |
x-1 |
x |
y |
y |
x |
x-y |
x |
A.
| B.
| C.
| D.y |
1 |
x+2 |
x2+2x+1 |
x2-4 |
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