2y-3z |
2yz |
2z-3x |
3zx |
9x-4y |
6xy |
A.零 | B.零次多项式 |
C.一次多项式 | D.不为零的分式 |
3x(2y-3z) |
6xyz |
2y(2z-3x) |
6xyz |
z(9x-4y) |
6xyz |
6xy-9xz+4yz-6xy+9xz-4yz |
6xyz |
a+b |
a |
a-b |
a |
a+b-a-b |
a |
x |
(x-1)2 |
1 |
(1-x)2 |
x |
(x-1)2 |
1 |
(x-1)2 |
x-1 |
(x-1)2 |
1 |
x-1 |
1 |
xy2 |
1 |
2y2 |
1 |
2(x2+y2) |
c |
a+b |
c |
a-b |
2c |
a2+b2 |
-a+ab-b |
a+b |
x |
x-3 |
x |
x+3 |
1 |
m+2 |
4 |
m2-4 |
A |
x+2 |
B |
x-3 |
7x-11 |
x2-x-6 |
x |
x-3 |
x+6 |
x2-3x |
1 |
x |
A.0 | B.
| C.
| D.
|
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