Question

（a²-1）/（a²-4）×（a²-4a+4）/（a+1)=

求过程 急急急急急急急急急急急急！！！

Answer 1

（a²-1）/（a²-4）×（a²-4a+4）/（a+1)
=(a-1)(a+1)/(a-2)(a+2）x(a-2)^2/(a+1)
=(a-1)(a-2)/(a+2)

追问

我算的a²-3a+2/a+2对吗

追答

对啊