(a／a-2－a/a+2)×4-a方／a 化简_数学解答

(a／a-2－a/a+2)×4-a方／a 化简

人气：487 ℃　时间：2020-04-18 09:33:44

解答

{[a/(a-2)-a/(a+2)]*(4-a²)}/a
={[(a²+2a-a²+2a)/(a-2)(a+2)]*(4-a²)}/a
={[4a/(a²-4)]*(4-a²)}/a
=-4a/a
=-4