1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3 N=-1先化简 再求值1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3 N=-1
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1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3N=-1先化简再求值1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3N=-11/2m-2(m-1/3
1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3 N=-1先化简 再求值1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3 N=-1
1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3 N=-1
先化简 再求值
1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3 N=-1
1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3 N=-1先化简 再求值1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)其中M=1/3 N=-1
1/2m-2(m-1/3n^2)-(3/2m-1/3n^2)
=1/2m-2m+2/3n²-3/2m+1/3n²
=-3m+n²
当m=1/3,n=-1
∴原式=-1+1=0
(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
(m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1
1/m-n,2/n^2-m^2,3n/2(m+n)通分
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.
化简:[3m^(n+4)+2m^(n+1)]/[3m^(n-1)]-[m^3-1/3][m^3+3]
-5m(-m+3n)+4m(-4m-5/2n),其中m=2,n=-1
(2m+n)(2m-n)+n(2m+n)-8m^2n^3/(2n^3) m=-2分之1,n=2013
化简:1/(m-n)根号(m^3-2m^2n+mn^2)(m
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
数学题[(m+3n)(m-3n)+(2n-m^2)+5n^2(1-m)-(2m^2-m^2n)÷(-1/2mn)
[3m-2n+1][3m+2n-1]
(3m+2n-1)(1+3m-2n)
(3m-2n)(3m+2n+1)求解
1对于正整数n和m,定义nm!(m是下标)=(n-m)(n-2m)(n-3m)...(n-km),其中m
(1/3m+0.75n)(0.8m-2/3n)
(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