x |
x2-4 |
1 |
2x-4 |
x |
x2-4 |
1 |
2x-4 |
x |
(x+2)(x-2) |
1 |
2(x-2) |
2x |
2(x-2)(x+2) |
x+2 |
2(x-2)(x+2) |
x-2 |
2(x+2)(x-2) |
1 |
2(x+2) |
1 |
2x+4 |
a |
a2-b2 |
b |
b2-a2 |
A.
| B.
| C.
| D.
|
m |
m+n |
m |
m-n |
m2 |
m2-n2 |
x2 |
x-1 |
1-x |
2-x |
1 |
x-2 |
x+3 |
x2-9 |
3 |
x-3 |
a2 |
a+1 |
1 |
a+1 |
a+3b |
a+b |
a-b |
a+b |
2xy2+1 |
(x-y)2 |
1+2x2y |
(y-x)2 |
© 2017-2019 超级试练试题库,All Rights Reserved.