x+4 |
x-1 |
4 |
x2-1 |
m |
x-2 |
1-x |
2-x |
1 |
5 |
1 |
5 |
1 |
5 |
5-m |
2 |
5-m |
2 |
a |
x-1 |
4 |
x2-1 |
1 |
x-1 |
2 |
x2-1 |
A.x=1 | B.x=-1 | C.x=1或x=-1 | D.x=2 |
3 |
x+2 |
k |
x+2 |
4ab |
a-b |
4ab |
a+b |
3 |
2 |
1 |
2 |
x+4 |
x-1 |
4 |
x2-1 |
1 |
x |
1 |
c |
1 |
c |
1 |
x |
1 |
c |
-1 |
x |
-1 |
c |
1 |
c |
2 |
x |
2 |
c |
2 |
c |
3 |
x |
3 |
c |
3 |
c |
m |
x |
m |
c |
2 |
x-1 |
2 |
a-1 |
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