(m+n)^2+6(m^2-n^2)=9(m-n)^2

(m-2n/n-m)-(n/m-n)= (m+2n)-6(m+2n)(2m-n)+9(n-2m) 因式分解 因式分解：(2n-m)^2-6(2n-m)(m+n)+9(m+n)^2 (1),(-m-n)(-m+n) (2),(-m+n)(m-n) (m+n)^2+6(m^2-n^2)=9(m-n)^2 若(m+n)^2-6(m+n)+9=1,则m+n=多少? （m+n)^2-6(m+n)+9=0,则m+n= 4m^2(m+n)-9n^2(m+n) (m-n)^9乘(n-m)^8/(m-n)^2 (m-n)^3(n-m)^2(m-n)=_____ (m-2n)(-m-n) 6（m+n)²-2（m+n) (3m-n)(m-2n)=() (m-n)^2*(m-n)^4=? m-{n-2m+[3m-(6m+3n)+5n]}= m-n+2n^2/(m+n) m^2-6m+9与|n-1|互为相反数,则(m/n-n/m)/(m/n)为? 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?