m/2m+n,2n/2n-4m,1/4m^2-n^2通分
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m/2m+n,2n/2n-4m,1/4m^2-n^2通分m/2m+n,2n/2n-4m,1/4m^2-n^2通分m/2m+n,2n/2n-4m,1/4m^2-n^2通分公分母4m²-n
m/2m+n,2n/2n-4m,1/4m^2-n^2通分
m/2m+n,2n/2n-4m,1/4m^2-n^2通分
m/2m+n,2n/2n-4m,1/4m^2-n^2通分
公分母4m²-n²;
m/2m+n=m(2m-n)/(4m²-n²)=(2m²-mn)/(4m²-n²),
2n/2n-4m=n/(n-2m)=(-n)(2m+n)/(4m²-n²)=(-2mn-n²)/(4m²-n²),
1/4m^2-n^2;
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(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
(n/m+n/2m^2)*4m/n^2
[(m-n)^2*(m-n)^3]^2/(m-n)^4
[(m-n)^2*(m-n)^3]^2/(m-n)^4
4m^2(m+n)-9n^2(m+n)
因式分解4m^2(m-n)+4n(n-m)
4m(m-n)^2+4n(n-m)^3
（m-n)2(n-m)3(n-m)4化简
4m(m-m)-2n(n-m)
(m-n)^2*(m-n)^4=?
化简,1.[(m+n-p)(m+p+n)-(m+n)²]/(-p),2.[(m+n)(m-n)-(m-n)²+2n(m-n)]/4n
(m-2n)(-m-n)
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
m+n/4m^-n^-m-2m/n^-4m^=
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=
（3m-4n）（4n+3m)-（2m-n）（2m+n)
[2(m+n)^5-3(m+n)^4+(-m-n)^3]÷[2(m+n)^3]