n |
m |
n+1 |
m+1 |
n |
m |
n+1 |
m+1 |
n |
m |
n-1 |
m-1 |
n |
m |
n-a |
m-a |
n |
m |
n-1 |
m-1 |
n(m-1)-m(n-1) |
m(m-1) |
m-n |
m(m-1) |
m-n |
m(m-1) |
n |
m |
n-1 |
m-1 |
n |
m |
n-1 |
m-1 |
n |
m |
n-a |
m-a |
n(m-a)-m(n-a) |
m(m-a) |
(m-n)a |
m(m-a) |
n |
m |
n-a |
m-a |
(m-n)a |
m(m-a) |
n |
m |
n-a |
m-a |
(m-n)a |
m(m-a) |
n |
m |
n-a |
m-a |
(m-n)a |
m(m-a) |
n |
m |
n-a |
m-a |
x+2 |
x+1 |
x-1 |
x+1 |
| ||
x-3 |
9 |
x-3 |
a |
a-b |
b |
b-a |
1 | ||
|
| ||
|
2 |
1-m |
1 |
m-1 |
2m+1 |
m-n |
m+n |
m-n |
1 |
m-n |
a-2 |
a2-4 |
2 |
2-a |
a-3 |
(a+2)(a-2) |
2 |
a-2 |
a-3 |
(a+2)(a-2) |
2(a+2) |
(a+2)(a-2) |
3+x |
x |
3+y |
y |
1 |
m+1 |
m+3 |
1-m2 |
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 |
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