已知m^2+n^2+2m-6n+10=0,则m+n等于?(m^2+2m+1)+(n^2-6n+9)=0,为什么10变成了9?

已知m^2+n^2-6m+10n+34=0,求m-n 已知|m-1|+|m+2n|=0 求试|m-n|+|m+n|快 已知m^2+n^2-10m+6n+34=0,求代数式2m+5n的值. 已知m^2+n^2-6m+10n+34=0求2m-3n的值 已知m的平方+N的平方+2M-6N+10=0,则M+N等于? 已知:m²+2m+n²-6n+10=0,求m,n的值 已知满足m²+n²+2m-6n+10=0,求m,n的值 已知m,n满足根号下m-2n+丨2m-n-6丨=0求根号下n/m × 根号下m^2+n^2. 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=? 已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= 已知m^2+9n^2+6m+6n+10=0,求(m^2-6mn+9n^2)/(m-3n)-(4m^2-9n^2)/(2m-3n) 已知m^2+9n^+6m+6n+10=0,求(m^2-6mn+9n^2)÷(m-3n)-(4m^2-9n^2)÷(2m-3n)的值 已知m/n=5、,求（m/（m+n）)+(m/(m-n))-(n^2/(m^3-n^2)) 已知2m-5n=0,求(1+(n/m)-(n/m-n))除以(1-(n/m)-(m/m+n))的值 已知2m-5n=0,求(1+(n/m)-(n/m-n))除以(1-(n/m)-(m/m+n))的值 急不要网上抄的 已知2m-5n=0,求(1+(n/m)-(n/m-n))除以(1-(n/m)-(m/m+n))的值.关键是解题的思路, 已知2m-5n=0,求(1+(n/m)-(n/m-n))除以(1-(n/m)-(m/m+n))的值 已知|m|=5,|n|=2 |m+n|=m+n,求m-n