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