若m^2-n^2=6,且m-n=2,则m+n=?

2025-06-22 12:31:44
推荐回答(2个)
回答1:

m^2-n^2=6,
(m-n)(m+n)=6
2(m+n)=6
m+n=3

回答2:

3
m^2-n^2=(m-n)(m+n)
m+n=3