好评哦!数学急需解答啊!拜托了各位!急急急!最好写纸上啊!

2025-05-20 07:16:29
推荐回答(2个)
回答1:

回答2:

原式=[(a-2)^2/(a-1)^2]*(a-1)/(a-2)(a+2)
=(a-2)/(a-1)(a+2)