3m+4n-[2m+5m-2n-3n]其中m=2n=2
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(m-n)2(n-m)7
您好:(m+4n)(m-n)-6(m+2n)(m-3n)=m²+3mn-4n²-6m²+6mn+36n²=-5m²+9mn+32n²不明白,
既然是相反数,就是m和n两者加起来为0的,例如-1和1,-2和2就互为相反数,所以这里答案是0咯
[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(m+5n)(n-3m)+(n-3m)^2=[(m+5n)-(n-3m)]^2=(4m+4n)^2=16(m-n)^
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+
(3m-4n)(4n+3m)-(2m-n)(2m+n)=(9m²-16n²)-(4m²-n²)=9m²-16n²-4m²+n
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
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=-(m-n)^3*(m-n)^2-(m-n)^5=-(m-n)^5-(m-n)^5=-2(m-n)^5
=(m²+3mn-4n²)-6(m²-mn-6n²)=m²+3mn-4n²-6m²+6mn+36n²=-5m²
设m-n为a(a^2*a^3)^2/a^4=a^6即(m-n)^6
解原式=-(m-n)³(m-n)²-(m-n)^5=-(m-n)^5-(m-n)^5=-2(m-n)^5
=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=5m^2-5n^2-2m^2-4mn-2n^2-3m^2+6mn-3n^2=2mn
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)
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(3m-n)]/(3m-n)=(5m-2n)(3m-n)/(3m-n)=5m-2n
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��