3a |
3a-2b |
2b |
3a-2b |
a+2b |
a-b |
b |
b-a |
2a |
a-b |
x |
(x-1)2 |
1 |
(x-1)2 |
x2-1 |
x2+2x+1 |
2 |
x+1 |
3a-2b |
3a-2b |
a+2b-b-2a |
a-b |
-(a-b) |
a-b |
x-1 |
(x-1)2 |
1 |
x-1 |
(x+1)(x-1) |
(x+1)2 |
2 |
x+1 |
x-1+2 |
x+1 |
x+1 |
x+1 |
1 |
x-1 |
1 |
1+x |
1 |
1+4 |
1 |
5 |
1 |
4 |
1 | ||
1+
|
4 |
5 |
1 |
2 |
1 |
2011 |
1 |
2012 |
1 |
1×2 |
1 |
2 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
n(n+1) |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
2011×2012 |
4 |
x2-4 |
1 |
x+2 |
1 |
2-x |
5x |
x-y |
5y |
y-x |
A |
2x-y |
B |
3x+y |
7x-y |
(2x-y)(3x+y) |
© 2017-2019 超级试练试题库,All Rights Reserved.