m^2-4mn+3n^2=要用配方方法分解因式

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m^2-4mn+3n^2=要用配方方法分解因式
m^2-4mn+3n^2=
要用配方方法分解因式

m^2-4mn+3n^2=要用配方方法分解因式
m^2-4mn+3n^2
=m^2-4mn+4n^2-n^2
=(m-2n)^2-n^2
=[(m-2n)+n][(m-2n)-n]
=(m-n)(m-3n)

m^2-4mn+3n^2=m^2-4mn+4n^2-n^2=(m-2n)^2-n^2=(m-2n+n)*(m-2n-n)=(m-n)*(m-3n)

m^2-4mn+3n^2
=(m-2n)²-n²
=(m-2n+n)(m-2n-n)
=(m-n)(m-3n)

m^2-4mn+3n^2=要用配方方法分解因式 m-4mn+3n 用配方法进行因式分解已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值 m-n=7 mn=-5求(3m+5n+4mn)-(2n-4n+6mn) 已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值已知m-n=4,mn=-1,求：（-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值. 已知m-n=3,mn=-3,求(-m-4n-mn)-(2mn-2m-3n)-(3mn+2n-2m)的值已知m-n=4,mn=-1,求（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn）的值. 若m-n=4,mn=-1,求（-2mn+2m+3n）-（3mn+2n-2m）-（m+4n+mn）若m-n=4,mn=-1求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn) 已知m-n=4,mn=-1,求（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值已知m-n=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值已知m-n=3,mn=-1,求多项式-2mn+2m+3n-3mn-2n+2m-4n-m-mn的值若m-n=4,mn=-1,求(-2mn+m+n)-(3mn+5n-5m)-(m+4n-3mn)的值已知m-n=4,m、n互为倒数求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4m+mn)的值 m2+n2+2mn-4m-3n=0 m2+n2-2mn-n+2=0 m,n分别是几?