若m^2-n^2=5(m+n)^2=4求(m-n)^2的值
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
诺2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
若m-n=3,3m+2n=2,求代数式6m(m-n)-4n(n-m)的值
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
若(3m-2n+1)与|5m=2n-n|互为相反数,求m+n的值
已知-m²+2m=4n,-n²+2n=4m,求m/n的值
已知m-2n=3.求[(3m+2n)(3m-2n)-(m+2n)(5m-2n)]÷1/3 m 的值.
已知m/n=5/3,求分式m/(m+n)+m/(m-n)-n^2/(m^2-n^2)的值
若m^2-n^2=5(m+n)^2=4求(m-n)^2的值
已知:3m-5n=0,求m/(m+n)+m/(m-n)-m^2/(m^2-n^2)的值
已知3m-5n=0求m/m+n+m/m-n-m^2/m^2-n^2的值
已知|2m-n/m+2n|=3,求2(2m-n)/m+2n-2m-n/m+2n-3的值