(3)3M-[2N-(2M-3N)-N]

2个回答

(2m+3n)(2m-3n)-(3m-2n)(3m+2n)
如果m-3n+4=0 求(m-3n)^2+7m^3-3(2m^3n-m^2n-1)+3(m^3+2m^3n-m^2n+n
计算：(3m+3n)(3m-3n)-(3m+3n)^2+（3m-2n)^2
(m-n)(3m+n)^2+(m+3n)^2(n-m)
m=3/2 n=-2 求(-m^3+3m^2n-n^3)-(m^3-2mn^2+n^3)+(
定义:m△n=m²+2n,m△n=m²-2n求（3△3）△3
因式分解（3m+n)(2m-n)-(m+3n)(n-2m)
（3m-4n）^2+2(3m-4n)(3m+4n)-3(3m+4n)^2
若m-n=3,3m+2n=2,求代数式3m(m-n)+2n(m-n)的值
若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n