a-1 |
a |
a2-1 |
a2+2a |
a-1 |
a |
a(a+2) |
(a-1)(a+1) |
a+2 |
a+1 |
a+1 |
a+1 |
a+2 |
a+1 |
1 |
a+1 |
1 |
2+1 |
1 |
3 |
1 |
x2-2x |
1 |
x2-4x+4 |
2 |
x2-2x |
2x+6 |
x2-4x+4 |
x-2 |
x2+3x |
1 |
x-2 |
3x |
x+2 |
x |
x-2 |
2x |
x2-4 |
5 |
a+b |
a-b |
a |
b-a |
2y |
y-3 |
y |
y+3 |
y2-9 |
y |
3x |
x-1 |
x |
x+1 |
x2-1 |
x |
© 2017-2019 超级试练试题库,All Rights Reserved.