x+2 |
2x-5 |
x-1 |
x2-1 |
x-2 |
x+3 |
5 |
2 |
x-1 |
x2-1 |
x-1 |
(x-1)(x+1) |
1 |
x+1 |
x |
3 |
m |
n |
30 |
x-6 |
1 |
π |
s |
a-b |
A.1个 | B.2个 | C.3个 | D.4个 |
3+x |
2-x |
A.x=2 | B.x≠2 | C.x=4 | D.x≠4 |
(x-1)(x+2) |
x2+4x+4 |
b |
a |
1 |
3 |
x |
x+y |
2 |
x |
x+y |
5 |
1 |
2-a |
x |
π-1 |
x |
2x+1 |
y |
2 |
A.1个 | B.2个 | C.3个 | D.4个 |
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