2x+n/m=m/n-(m/n+n/m)x(m+n不等于0)
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2x+n/m=m/n-(m/n+n/m)x(m+n不等于0)
2x+n/m=m/n-(m/n+n/m)x(m+n不等于0)
2x+n/m=m/n-(m/n+n/m)x(m+n不等于0)
2x+n/m=m/n-(m/n+n/m)x
(m/n+n/m+2)x=m/n-n/m
﹙m+n﹚²x/﹙mn﹚=﹙m+n)(m-n)/﹙mn﹚
∵m+n不等于0
∴x=(m-n)/﹙m+n﹚
(m-2n/n-m)-(n/m-n)=
2x+n/m=m/n-(m/n+n/m)x(m+n不等于0)
(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
(m-2n)(-m-n)
(m-n)^3(n-m)^2(m-n)=_____
n=m/M
m-n+2n^2/(m+n)
(3m-n)(m-2n)=()
(m-n)^2*(m-n)^4=?
m-[n-3m-(m-n)]=?
2(m-n)²-m(m-n)
(m-n)(m+n)+(m+n)²-2m²
m,n为有理数,证明方程(m+n)x+m-(m-n)y+n=0
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
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))
x(m+n)-y(n+m)+(m+n)等于多少