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