问题
解答题
化简：(a-
|
答案
(a-
)÷a a+1
•a2-2a a2-4
．a+1 a23a+2
=[
]×a(a+1)-a a+1
•(a+2)(a-2) a(a-2) a+1 (a-2)(a-1)
=
×a2 a+1
•(a+2)(a-2) a(a-2) a+1 (a-2)(a-1)
=a2(a+2) a(a-1)(a-2)
=
．a(a+2) (a-1)(a-2)
搜题请搜索小程序“爱下问搜题”