y |
x |
x2 |
y |
y |
x |
x2 |
y |
y4 |
x3 |
x2 |
y |
4(m+n) |
4m2+8mn+4n2 |
1 |
m+n |
x+y+1 |
-x+y+1 |
m2-3m+2 |
m-m2 |
2-m |
m |
1 |
a+b |
A.1个 | B.2个 | C.3个 | D.4个 |
x |
6y2 |
x2 |
4y |
m-m2 |
m2-1 |
m |
m-1 |
m+1 |
m-1 |
x-y |
x+2y |
x2-y2 |
x2+4xy+4y2 |
2x |
y |
a2-4 |
a+2 |
1 |
a-2 |
(1-a)n |
(a-1)n+1 |
© 2017-2019 超级试练试题库,All Rights Reserved.