A.分式方程
| ||||||
B.站在M处看N处在北偏东30°的方向上,那么站在N处看M处在南偏西60°的方向上 | ||||||
C.已知M=
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D.四边都相等的四边形是正方形 |
1-x |
x+5 |
x-1 |
x-5 |
(1-x)(x-5)-(x-1)(x+5) |
(x+5)(x-5) |
1 |
x+1 |
1 |
x-1 |
2 |
x2-1 |
2 |
x2-1 |
2m |
m2-4 |
1 |
m+2 |
3x-1 |
x2+2x-15 |
A |
x-3 |
B |
x+5 |
b |
a-b |
a |
a-b |
1 |
x |
1 |
x-1 |
A.
| B.-
| C.
| D.
|
m2 |
m-n |
n2 |
m-n |
A.m+n | B.m-n | C.n-m | D.-m-n |
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