1 |
a |
1 |
b |
1 |
a |
1 |
b |
b-a |
ab |
a-b |
ab |
a-b |
2(a-b) |
1 |
2 |
1 |
2 |
x2 |
y-x |
y2 |
y-x |
3x |
x-1 |
x |
x+1 |
x2-1 |
x |
a |
a-1 |
1 |
a+1 |
1 |
a-4 |
1 |
a+4 |
2 |
4-a |
1 |
a |
1 |
a |
A.
| B.
| C.
| D.
|
x2+4 |
x-2 |
4x |
2-x |
x+3 |
x+2 |
2-x |
x2-4 |
(x+3)(x-2) |
x2-4 |
x-2 |
x2-4 |
x2+x-6-x-2 |
x2-4 |
x2-8 |
x2-4 |
x+3 |
x+2 |
x-2 |
(x+2)(x-2) |
x+3 |
x+2 |
1 |
x+2 |
x+3-1 |
x+2 |
A.小明 | B.小亮 | C.小芳 | D.没有正确的 |
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