a+2 |
a2-2a+1 |
a2-4a+4 |
a+1 |
a2-4 |
a2-1 |
x |
y |
y |
x |
x2+y2 |
xy |
a+2 |
(a-1)2 |
(a-2)2 |
a+1 |
(a+1)(a-1) |
(a+2)(a-2) |
a-2 |
a-1 |
x2 |
xy |
y2 |
xy |
x2+y2 |
xy |
x2-y2+x2+y2 |
xy |
2x |
y |
x |
y |
y |
x |
1 |
y |
1 |
x |
1+x |
y |
x-y |
x |
2a |
a2-4 |
1 |
a-2 |
2x |
x-3 |
x |
x+3 |
x2-9 |
x |
a2+1 |
a |
(a+2)(a-1) |
a2+2a |
x |
y |
y |
x |
x+y |
x |
1 |
22 |
27 |
1 |
4 |
|
b |
a-b |
b3 |
a3-2a2b+ab2 |
ab+b2 |
a2-b2 |
12 |
3 |
© 2017-2019 超级试练试题库,All Rights Reserved.