问题
解答题
化简：(
|
答案
原式=(
-a(a+2) (a+2)(a-2)
)÷a(a-2) (a+2)(a-2) a 2-a
=
•a(a+2)-a(a-2) (a-2)(a+2) 2-a a
=
•4a (a+2)(a-2) -(a-2) a
=-
．4 a+2
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化简：(
|
原式=(
-a(a+2) (a+2)(a-2)
)÷a(a-2) (a+2)(a-2) a 2-a
=
•a(a+2)-a(a-2) (a-2)(a+2) 2-a a
=
•4a (a+2)(a-2) -(a-2) a
=-
．4 a+2