2a |
a2-4 |
1 |
a-2 |
3 |
x-1 |
1 |
x+1 |
x2-1 |
x |
1-x |
x-2 |
1 |
2-x |
2a-(a+2) |
(a+2)(a-2) |
a-2 |
(a+2)(a-2) |
1 |
a+2 |
3x+3-x+1 |
(x+1)(x-1) |
(x+1)(x-1) |
x |
2x+4 |
x |
2-x |
x-5 |
m |
5-x |
A.-2 | B.2 | C.5 | D.3 |
x |
x+1 |
m |
x+1 |
A.-1 | B.O | C.1 | D.-2 |
A.解分式方程一定会产生增根 | ||||
B.方程
| ||||
C.方程|x|=1与方程x+
| ||||
D.代数式
|
5 |
2x+3 |
3 |
x-1 |
x |
x-1 |
3 |
2x-2 |
2 |
x-3 |
1 |
x-k |
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