2 |
a+1 |
a+2 |
a2-1 |
a |
a-1 |
2(a-1) |
(a+1)(a-1) |
a+2 |
(a+1)(a-1) |
a-1 |
a |
3a |
(a+1)(a-1) |
a-1 |
a |
3 |
a+1 |
3 |
2+1 |
x2 |
x+2 |
4 |
x+2 |
x-2 |
x |
x-1 |
x+2 |
x2-2x+1 |
x2-4 |
1 |
x-1 |
2011a |
a2-2a+1 |
1 |
a-1 |
x2-y2 |
x+y |
1 |
3 |
3x |
x-2 |
x |
x+2 |
2x |
x2-4 |
a2-1 |
a2+6a+9 |
a2-9 |
a-1 |
x-1 |
x+2 |
x2-2x+1 |
x2-4 |
1 |
x-1 |
x-1 |
x+1 |
2x |
x2-1 |
1 |
x2-1 |
2011 |
2011 |
2011 |
© 2017-2019 超级试练试题库,All Rights Reserved.