问题
解答题
计算：
|
答案
-1 a-2 4 (a+2)(a-2)
=
-a+2 (a+2)(a-2) 4 (a+2)(a-2)
=a+2-4 (a+2)(a-2)
=a-2 (a+2)(a-2)
=
．1 a+2
搜题请搜索小程序“爱下问搜题”
计算：
|
-1 a-2 4 (a+2)(a-2)
=
-a+2 (a+2)(a-2) 4 (a+2)(a-2)
=a+2-4 (a+2)(a-2)
=a-2 (a+2)(a-2)
=
．1 a+2