(m+n)^2+6(m^2-n^2)=9(m-n)^2
(m+2n)-6(m+2n)(2m-n)+9(n-2m) 因式分解
(m+n)²-6(m+n)+9=(m+n)²+2(m+n)×(-3)+(-3)²=[(m+
若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n
m-n+2n^2/(m+n)
(m-n)^2 +n(n- m)
(m-n)+2n(m-n)
(m-n)(m-n+2)-6因式分解
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
(m+n)^2+6(m^2-n^2)=9(m-n)^2
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
分式加减法:化简:2m/m-n-n/n-m+m+2n/n-m