(2m+n)*(3m-2n)*1\2=?ji
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(2m+n)*(3m-2n)*1\2=?ji(2m+n)*(3m-2n)*1\2=?ji(2m+n)*(3m-2n)*1\2=?ji(2m+n)*(3m-2n)*1/2=1/2*[2m*3m-2m*2
(2m+n)*(3m-2n)*1\2=?ji
(2m+n)*(3m-2n)*1\2=?
ji
(2m+n)*(3m-2n)*1\2=?ji
(2m+n)*(3m-2n)*1/2
=1/2*[2m*3m-2m*2n+n*3m-n*2n]
=1/2*(6m^2-4mn+3mn-n^2)
=1/2*(6m^2-mn-n^2)
=3m^2-1/2mn-1/2n^2
(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
(m-n)^3(n-m)^2(m-n)=_____
(3m-n)(m-2n)=()
(m-2n/n-m)-(n/m-n)=
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
(2m+n)(2m-n)+n(2m+n)-8m^2n^3/(2n^3) m=-2分之1,n=2013
若2m=3n,求分式(1+m/n-n/n-m)除以(1-m/n-n/n+m)的值
若2m=3n,求分式(1+m/n-n/n-m)除以(1-m/n-n/n+m)的值
(m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
m/n=5/3,求(m/m+n)+(m/m+n)-(n^2/m^2-n^2)
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
m^2=n+2,n^2=m+2(m不等于n),求m^3-2mn+n^3的值因为m^2=n+2,n^2=m+2 所以 m^2-n^2=n-m 即 (m-n)(m+n)=n-m m+n=1为什么得m+n=1,求详解.
2m+3n+2m+3n+m+2m+3n+n=______
C(m,n)=n(n-1)(n-2)...(n-m+1)/m!中的!
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=
(m-n)*(3m-2n+1)=?
解方程组:(m+n)-2(m-n)=1 3(m+n)+2(m-n)=3 (m+n)-2(m-n)=1 3(m+n)+2(m-n)=3 是这两个方程