问题
解答题
计算：(
|
答案
(
-1 a+2
)÷1 a-2 4 a2
=[
-a-2 (a+2)(a-2)
]•a+2 (a+2)(a-2) a2 4
=
•-4 (a+2)(a-2) a2 4
=-a2 (a+2)(a-2)
当a=-1时，原式=-
=(-1)2 (-1+2)(-1-2)
．1 3
搜题请搜索小程序“爱下问搜题”
计算：(
|
(
-1 a+2
)÷1 a-2 4 a2
=[
-a-2 (a+2)(a-2)
]•a+2 (a+2)(a-2) a2 4
=
•-4 (a+2)(a-2) a2 4
=-a2 (a+2)(a-2)
当a=-1时，原式=-
=(-1)2 (-1+2)(-1-2)
．1 3