3 |
2 |
2 |
a+2 |
1 |
b-1 |
2(b-1) |
a+2 |
2(b-1) |
a+2 |
3 |
2 |
2(b-1) |
a+2 |
2(
| ||
2+2 |
1 |
4 |
3 |
2 |
1 |
4 |
1 |
a |
1 |
b |
ab |
a2-b2 |
A.
| B.-
| C.a-b | D.b-a |
x |
x2-4x+4 |
2 |
(x-2)3 |
A.1个 | B.2个 | C.3个 | D.4个 |
a |
b |
b |
a |
a2-2ab+b2 |
ab |
A.ab | B.
| C.
| D.
|
3x+6 |
x2+4x+4 |
x-2 |
x+2 |
1 |
x-2 |
x |
x-1 |
1 |
x2-x |
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