问题:
先化简,再求值. (
2
x-2
-
x-2
x2-4x+4
)÷
x2+2x
x-2
,其中x 2+2x-4=0.
先化简,再求值. (
-
)÷
,其中x 2+2x-4=0.
2 |
x-2 |
x-2 |
x2-4x+4 |
x2+2x |
x-2 |
参考答案: