计算：(a²-4/a²-2a+1)(a²-1/a²+4a+4)

计算：(a²-4/a²-2a+1)(a²-1/a²+4a+4)
计算：(a²-4/a²-2a+1)(a²-1/a²+4a+4)

计算：(a²-4/a²-2a+1)(a²-1/a²+4a+4)
[(a²-4)/(a²-2a+1)]*[(a²-1)/(a²+4a+4) ]
=[(a+2)(a-2)/(a-1)²]*[(a+1)(a-1)/(a+2)²]
=[(a-2)(a+1)]/[(a-1)(a+2)]
=(a²-a-2)/(a²+a-2)

别急，有我！希望有帮助！呵呵！