b2 |
a+b |
a+b |
a |
x-1 |
x |
x-2 |
x+1 |
2x2-x |
x2+2x+1 |
a2 |
a+b |
a+b |
a |
x2-1-x2+2x |
x(x+1) |
x(2x-1) |
(x+1)2 |
2x-1 |
x(x+1) |
(x+1)2 |
x(2x-1) |
x+1 |
x2 |
x+1 |
x+1 |
a2 |
b |
b2 |
a |
b |
a |
1 |
x |
1 |
2x |
1 |
3x |
1 |
a |
1 |
b |
2 |
a+b |
ab |
a2-b2 |
x-2 |
2x-1 |
1.5 |
1-2x |
1 |
x+1 |
x2-2x+1 |
x2-1 |
x-1 |
x+1 |
m-a |
n-a |
A.
| B.
| ||||
C.
| D.以上答案都不对 |
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