化简(a-a+1分之a)÷a눀-4分之a눀-2a×a눀+3a+2分之a-1

2025-01-07 11:22:14
推荐回答(1个)
回答1:

=(a²+a-a)/(a+1)×(a+2)(a-2)/a(a-2)×(a-1)/(a+1)(a-1)
=a²/(a+1)×(a+2)/a×1/(a+1)
=a(a+2)/(a+1)²