當(m+n)^2+595取最小值時,m^2-n^2=(),|2m|-|2n|= 當(m+n)^2+595取最小值時, m^2-n^2= |2m|-|2n|=

當(m+n)^2+595取最小值時,m^2-n^2=(),|2m|-|2n|= 當(m+n)^2+595取最小值時, m^2-n^2= |2m|-|2n|=


去最小值時,m=-n
m^2-n^2=0
|2m|-|2n|=0