问题
解答题
计算：(
|
答案
原式=
•x-1-x-1-2(x+1)(x-1) (x+1)(x-1) 1-x 2
=
•-2x2 (x+1)(x-1) 1-x 2
=
．x2 x+1
搜题请搜索小程序“爱下问搜题”
计算：(
|
原式=
•x-1-x-1-2(x+1)(x-1) (x+1)(x-1) 1-x 2
=
•-2x2 (x+1)(x-1) 1-x 2
=
．x2 x+1