3 |
(x-1)(x-2) |
A.x≠1 | B.x≠2 | C.x≠1且x≠2 | D.x≠-1或x≠-2 |
x2-4 |
x2-2x-3 |
A.x=-1 | B.x=3 | C.x=-1且x=3 | D.x=-1或x=3 |
x2-4x+3 |
(x-1)(x-2) |
A.x=1或x=3 | B.x=3 | C.x=1 | D.x≠1且x≠2 |
x2-25 |
x+5 |
x2-25 |
x+5 |
x+2 |
3x-1 |
1 |
|x|-2 |
1 |
a-b |
x+y |
3 |
2s |
π |
1 |
x |
3 |
|x| |
x-2y |
9 |
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