3 |
x+1 |
x2-4x+4 |
x+1 |
3-x2+1 |
x+1 |
(x-2)2 |
x+1 |
-(x+2)(x-2) |
x+1 |
x+1 |
(x-2)2 |
-x-2 |
x-2 |
-1-2 |
1-2 |
x |
x-2 |
x |
x+1 |
2x |
2-x |
x2-1 |
x2-2x+1 |
1 |
x-1 |
2 |
x-1 |
1 |
x2-1 |
3 |
A.刚好2kg | B.顾客吃亏了 | C.商店吃亏了 | D.无法确定 |
x+1 |
x2-x |
x |
x2-2x+1 |
1 |
x |
2 |
x-3 |
x+3 |
2x |
x2-9 |
3 |
4-x |
x-2 |
12 |
x-2 |
3 |
x-3 |
2x-4 |
5 |
x-2 |
3 |
© 2017-2019 超级试练试题库,All Rights Reserved.