已知m+n=5,m^2-n^2=15,则m-n与m^2-n^2的值分别是?已知m+n=5,m^2-n^2=15,则m-n与m^2+n^2的值分别是?

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已知m+n=5,m^2-n^2=15,则m-n与m^2-n^2的值分别是?已知m+n=5,m^2-n^2=15,则m-n与m^2+n^2的值分别是?
已知m+n=5,m^2-n^2=15,则m-n与m^2-n^2的值分别是?
已知m+n=5,m^2-n^2=15,则m-n与m^2+n^2的值分别是?

已知m+n=5,m^2-n^2=15,则m-n与m^2-n^2的值分别是?已知m+n=5,m^2-n^2=15,则m-n与m^2+n^2的值分别是?
m+n=5,
m^2-n^2=(m-n)(m+n)
=5(m-n)=15
m-n=3
解方程的
m=4
n=1
m-n=3
m^2+n^2=17