问题
解答题
计算：
|
答案
原式=
•x(x+y) x(x-y)
•1 x-y x(x-y) xy
=
•x+y x-y
•1 x-y x-y y
=
．x+y xy-y2
搜题请搜索小程序“爱下问搜题”
计算：
|
原式=
•x(x+y) x(x-y)
•1 x-y x(x-y) xy
=
•x+y x-y
•1 x-y x-y y
=
．x+y xy-y2