若m⼀n=2,则(m+3n)⼀(m-n)=?

2025-06-29 06:26:44
推荐回答(1个)
回答1:

m/n=2
m=2n
(m+3n)/(m-n)
=(2n+3n)/(2n-n)
=5n/n
=5