1 |
a+1 |
a2-a |
a+1 |
a |
a+1 |
a(a-1) |
a+1 |
a |
a+1 |
a+1 |
a(a-1) |
1 |
a-1 |
x |
x-y |
2y |
x-y |
x-2y |
xy |
1 |
x |
1 |
y |
1 |
x |
1 |
y |
5x+xy-5y |
x-xy-y |
A.
| B.-
| C.-3 | D.3 |
12xy |
5a |
1 |
x |
1 |
y |
y-x |
3x2 |
a2 |
a-b |
b2 |
b-a |
a+b |
a-b |
a2-b2 |
a2-ab |
2ab+b2 |
a |
3 |
x-1 |
1 |
x+1 |
x |
x2-1 |
1 |
2 |
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