3+x |
x |
3+y |
y |
1 |
m+1 |
m+3 |
1-m2 |
y(3+x)+x(3+y) |
xy |
3x+3y+xy |
xy |
1-m |
(1+m)(1-m) |
m+3 |
(1+m)(1-m) |
4 |
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 |
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 |
© 2017-2019 超级试练试题库,All Rights Reserved.