4(m+n)^2-9(n-m)^2
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4(m+n)^2-9(n-m)^2
![4(m+n)^2-9(n-m)^2](/uploads/image/z/19394993-65-3.jpg?t=4%EF%BC%88m%2Bn%EF%BC%89%5E2-9%28n-m%29%5E2)
4(m+n)²-9(n-m)²
=[2(m+n)]²-[3(n-m)]²
=[2(m+n)+3(n-m)][2(m+n)-3(n-m)]
=(2m+2n+3n-3m)(2m+2n-3n+3m)
=(5n-m)(5m-n)
=[2(m+n)]²-[3(n-m)]²
=[2(m+n)+3(n-m)][2(m+n)-3(n-m)]
=(2m+2n+3n-3m)(2m+2n-3n+3m)
=(5n-m)(5m-n)
(3m-4n)(4n+3m)-(2m-n)(2m+n)
【(m+n)(m-n)-(m-n²)+2n(m-n)】÷4n
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
[(m-n)^2*(m-n)^3]^2/(m-n)^4
因式分解4m^2(m-n)+4n(n-m)
(m-n)2(n-m)3(n-m)4化简
化简m/(m+n)²+n/m²-n²-2n²/(m+n)(m²-n
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
m-n+2n^2/(m+n)
(m-n)^2 +n(n- m)
(m-n)+2n(m-n)
9(2m+n)^2-4(m-2n)^2