5m²n(2n 3m-n²)

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5m²n(2n 3m-n²)
计算[5(m+n)2(m-n)]3÷【3(m+n)2(n-m)]2

[5(m+n)2(m-n)]3÷【3(m+n)2(n-m)]2=125(m+n)的6次方(m-n)³÷9(m+n)的4次方(m-n)²=125/9(m+n)²(m-n)如

(m+5n)^2-2(5n+m)(n-3m)+(3m-n)^2

(m+5n)^2-2(5n+m)(n-3m)+(3m-n)^2=(m+5n)^2-2(m+5n)(n-3m)+(n-3m)^2=[(m+5n)-(n-3m)]^2=(4m+4n)^2=16(m-n)^

(m-n)^2 +n(n- m)

(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

计算:5(m+n)(m-n)-2(m+n)^2-3(m-n)^2

5(m+n)(m-n)-2(m+n)^2-3(m-n)^2=5(m^2-n^2)-2(m^2+2mn+n^2)-3(m^2-2mn+n^2)=5m^2-5n^2-2m^2-4mn-2n^2-3m^2+

计算4(m+n)^2·(-m-n)^3-(m+n)(-m-n)^4+5(m+n)^5

4(m+n)^2·(-m-n)^3-(m+n)(-m-n)^4+5(m+n)^5=-4(m+n)^2·(m+n)^3-(m+n)(m+n)^4+5(m+n)^5=-4(m+n)^5-(m+n)^5+5

计算4(m+n)^2乘(-m-n)^3-(m+n)(-m-n)^4+5(m+n)^5

4(m+n)^2乘(-m-n)^3-(m+n)(-m-n)^4+5(m+n)^5=-4(m+n)^5-(m+n)^5+5(m+n)^5=0

(n-m)^3×(m-n)^2-(m-n)^5

(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

[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n

原式=(m²-n²-m²+2mn-n²+2mn-2n²)÷4n=(-4n²+4mn)÷4n=-4n²÷4n+4mn÷4n=-n+m

(m-n)+2n(m-n)

﹙m-n﹚²+2n﹙m-n﹚=﹙m-n﹚﹙m-n+2n﹚=﹙m-n﹚﹙m+n﹚.

因式分解(n-m)^3(m-n)^2-(m-n)^5

解原式=-(m-n)³(m-n)²-(m-n)^5=-(m-n)^5-(m-n)^5=-2(m-n)^5

计算 4(m+n)^2*(-m-n)^3-(m+n)(-m-n)^4+5(m+n)^5 请写出步骤...

=4*(m+n)^2*(-1)*(m+n)^3-(m+n)*(-1)^4*(m+n)^4+5(m+n)^5=-4(m+n)^5-(m+n)^5+5(m+n)^5=0

5(m+n)(m-n)-2(m+n)平方-3(m-n)平方

5(m+n)(m-n)-2(m+n)平方-3(m-n)平方=5m^2-5n^2-2m^2-4mn-2n^2-3m^2+6mn-3n^2=2mn

已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))

已知m=5n,则原式=(5n/(5n+n))+(5n/(5n-n))-(n^2)/(((5n)^3)-n^2)=(5/6)+(5/4)-[1/(125n-1)]=(25/12)-[1/(125n-1)

(m-5n)(m-n)-6(m+2n)(m-3n)

原式=(m²-mn-5mn+5n²)-6(m²-3mn+2mn-6n²)=(m²-6mn+5n²)-6(m²-mn-6n²

[5m(3m-n)+2n(n-3m)]/(3m-n)

[5m(3m-n)+2n(n-3m)]/(3m-n)=[5m(3m-n)-2n(3m-n)]/(3m-n)=(5m-2n)(3m-n)/(3m-n)=5m-2n

m-n+2n^2/(m+n)

m-n+2n^2/(m+n)=[(m-n)(m+n)+2n^2]/(m+n)=(m^2+n^2)/(m+n)

若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值

(2m-n)/(m+2n)=5∴(m+2n)/(2m-n)=1/5∴3(2m-n)/m+2n-m+2n/2m-n+3=3×(2m-n)/(m+2n)+(m+2n)/(2m-n)+3=15+1/5+3=

[2(m+n)^5-3(m+n)^4+(-m-n)^3]÷[2(m+n)^3]

原式=2(m+n)^5÷[2(m+n)^3]-3(m+n)^4÷[2(m+n)^3]+(-m-n)^3÷[2(m+n)^3]=(m+n)^2-3(m+n)/2-1/2再问:��Ҳ�㵽��һ���ˣ��