x |
x2-1 |
x+x2 |
x2 |
a+2 |
a-2 |
4 |
a2-4a+4 |
a |
a-2 |
x |
(x+1)(x-1) |
x(x+1) |
x2 |
1 |
x-1 |
( a+2 )( a-2 ) |
( a-2 )2 |
4 |
( a-2 )2 |
a-2 |
a |
a2 |
( a-2 )2 |
a-2 |
a |
a |
a-2 |
x-1 |
x+2 |
x2-4 |
x2-2x+1 |
1 |
x2-1 |
3 |
a-2 |
a+1 |
a2-4 |
1 |
a |
a |
2-a |
1 |
a-2 |
a |
b |
4 |
3 |
a |
a+b |
b |
a-b |
b2 |
a2-b2 |
3-m |
2m-4 |
5 |
m-2 |
© 2017-2019 超级试练试题库,All Rights Reserved.