6a2bc3 |
70ac2 |
6x2-6y2 |
3x2-6xy+3y2 |
6a2bc3 |
70ac2 |
3abc |
35 |
6x2-6y2 |
3x2-6xy+3y2 |
6(x+y)(x-y) |
3(x-y)2 |
2(x+y) |
x-y |
2x+2y |
x-y |
a |
b |
c |
d |
a |
c |
b |
d |
a+b |
b |
c+d |
d |
a+b |
a-b |
c+d |
c-d |
1 |
a |
1 |
b |
a-2ab-b |
2a+7ab-2b |
5-2y+2y2 |
-x2+2x+2 |
3x2-3xy |
xy-y2 |
3x |
() |
x2 |
x2+x |
x |
1+x |
A.x≠-1或x≠0 | B.x≠-1 | C.x≠-1且x≠0 | D.x≠0 |
© 2017-2019 超级试练试题库,All Rights Reserved.