a-2 |
a2 |
a-1 |
a2-4a+4 |
a-1 |
a |
4xy |
x-y |
4xy |
x+y |
a-2 |
a2 |
a-1 |
(a-2)2 |
a |
a-1 |
1 |
a(a-2) |
4xy+(x-y)2 |
x-y |
4xy-(x+y)2 |
x+y |
(x+y)2 |
x-y |
-(x-y)2 |
x+y |
2-x |
x+2 |
2x |
x2-4 |
2 |
1 |
x |
x3+mx2+x |
x4+2mx2+1 |
1 |
3 |
A.-2 | B.-1 | C.1 | D.2 |
b2 |
a |
a2 |
b |
a2-4 |
a-3 |
1 |
a-2 |
10 |
x+2 |
30 |
x+7 |
x2-2x |
x+1 |
1 |
x |
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