问题
解答题
计算：
|
答案
原式=
-2 x+1
×x-2 (x+1)(x-1) (x-1)2 x(x-2)
=
-2 x+1 x-1 x(x+1)
=2x-(x-1) x(x+1)
=
．1 x
搜题请搜索小程序“爱下问搜题”
计算：
|
原式=
-2 x+1
×x-2 (x+1)(x-1) (x-1)2 x(x-2)
=
-2 x+1 x-1 x(x+1)
=2x-(x-1) x(x+1)
=
．1 x