1 |
a-2 |
a-2 |
a2-4 |
a-2 |
a-2 |
1 |
a-2 |
a-2 |
(a+2)(a-2) |
a-3 |
a-2 |
(a+2)(a-2) |
a-2 |
(a-3)(a+2) |
a-2 |
(-3-3)(-3+2) |
-3-2 |
6 |
5 |
3x |
x-2 |
x |
x+2 |
x |
x2-4 |
1 |
x |
1 |
y |
A.
| B.2 | C.-
| D.-2 |
a2+2a+1 |
a2-1 |
1 |
a-1 |
2 |
x2 |
x-y |
y2 |
x-y |
2a |
a2-4 |
1 |
2-a |
a2 |
b |
b2 |
a |
b |
a |
3-x |
2x-4 |
5 |
x-2 |
x |
x-y |
2y |
x-y |
xy |
x-2y |
1 |
x |
1 |
y |
© 2017-2019 超级试练试题库,All Rights Reserved.