(㎡-n²)+(2m-2n)
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(2m-n)/(n-m)+m/(m-n)+n/(n-m)=(2m-n)/(n-m)-m/(n-m)+n/(n-m)=(2m-n-m+n)/(n-m)=m/(n-m)欢迎采纳!
(m-n)2(n-m)7
m/(m-n)^2-n/(n-m)^2=m/(m-n)^2-n/(m-n)^2=(m-n)/(m-n)^2=1/(m-n)
2-n-1-m+m+2-m=3-m-n
(m+n)^3-(n+m)(m-n)^2=(m+n)[(m+n)^2-(m-n)^2]=(m+n)[(m+n+m-n)(m+n-m+n)]=(m+n)(2m+2n)=2(m+n)^2
(m-n)^2+n(n-m)原式=(n-m)^2+n(n-m)=(n-m)(n-m+n)=(n-m)(2n-m)因为完全平方所以(m-n)^2=(n-m)^2(a-b)(3r-t)+9(b-a)(2t
2+n(m-1)/m-m(n-2)/n
2m-n/n-m+m/m-n+n/n-m=(2m-n-m+n)/(n-m)=m/(n-m)
(n-m)^3×(m-n)^2-(m-n)^5=-(m-n)^3*(m-n)^2-(m-n)^5=-(m-n)^5-(m-n)^5=-2(m-n)^5
原式=(m²-n²-m²+2mn-n²+2mn-2n²)÷4n=(-4n²+4mn)÷4n=-4n²÷4n+4mn÷4n=-n+m
2m(m-n)平方-2n(n-m)平方=2m(m-n)^2-2n(m-n)^2=(2m-2n)(m-n)^2=2(m-n)^3
设m-n为a(a^2*a^3)^2/a^4=a^6即(m-n)^6
﹙m-n﹚²+2n﹙m-n﹚=﹙m-n﹚﹙m-n+2n﹚=﹙m-n﹚﹙m+n﹚.
4m^2(m-n)+4n(n-m)=4m^2(m-n)-4n(m-n)=4(m-n)(m^2-n)
解原式=-(m-n)³(m-n)²-(m-n)^5=-(m-n)^5-(m-n)^5=-2(m-n)^5
m+n+n=m+2nm+n-n=m所以是m(m+2n)
m-n+2n^2/(m+n)=[(m-n)(m+n)+2n^2]/(m+n)=(m^2+n^2)/(m+n)
m(m-n)^2+n(n-m)^2=m(m-n)^2+n(m-n)^2=(m-n)^2(m+n)=(m+n)(m-n)^2
(m+n)(m-n)(m^2+n^2)=(m^2-n^2)(m^2+n^2)=m^4-n^4再问:确定?再答:平方差公式再问:没有学过
3m(m-n)-2n(m-n)²=(m-n)(3m-2mn+2n²)