8x5y |
|
2xy |
4x2y2 |
1 |
2 |
x3y |
2xy |
|
xy+xy |
A.0对 | B.1对 | C.2对 | D.3对 |
8x5y |
2xy |
|
1 |
x |
2xy |
8x5y |
|
4x2y2 |
2xy |
1 |
2 |
x3y |
1 |
2 |
xy |
1 |
2 |
x3y |
2xy |
|
1 |
2 |
2xy |
xy+xy |
2xy |
|
xy+xy |
1 |
2 |
5a-8 |
3a-4 |
2 |
A.
| B.
| C.
| D.
|
2b+1 |
7-b |
b-a | 3b |
2b-a+2 |
1+x |
4-2x |
A.x=-
| B.x=
| C.x=1 | D.x=-1 |
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