若|m-3|+(n+2)^2=0,则m+2n的值为?

若m+n=0,则多项式m^3-m^3n-mn^2+n^3 若|m-n|+(m+2n-3)²=0,则m+n的值是 已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=? 若(m+n)^2-mn(m+n)=(m+n)·M,则M是（） A.m^2+n^2 B.m^2-mn+n^2 C.m^2-3mn+n^2 D.m^2+mn+n^2 根号m+2n+6+根号2m+m-3=0,则m+n= 若（m+n)(m-n)^2-mn(m+n)=(m+n)·M,则M是 1若m=n,则|m|=|n|;2若m=—n,则|m|=|n|;3若|m|=|n|,则m=—n;4若|m|=|n|,则m=n哪个对 若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n)/[4(2m+n)]}的值是? 若实数m n 满足(m+n)(m+n-2)-8=0 则m+n=? 若有理数m,n满足m-2n=4,2m-n=3,则m+n等于 若|m-n|=n-m,且|m|=4、|n|=3,则（m+n)^2= 若|m-n|=n-m,且|m|=4,|n|=3,则(m+n)^2=? 若m^2+n^2+2m-4n+5=0,则m+n=? 若m^2+n^2-6n+4m+13=0则m-n=? 若m^2-n^2=6,且m-n=3,则m+n=? 集合M={m^2,m+1,-3},N={m-3,2m-1,m^2+1},若M交N={-3},则m=? 若m n互为相反数 则3[m-n]-1/2[2m-10n]=?