m^2+2mn=384,3mn+2n^2=560,则2m^2+13mn+6n^2-438的值是
来源：学生作业帮助网 编辑：六六作业网 时间：2024/10/03 06:34:38
m^2+2mn=384,3mn+2n^2=560,则2m^2+13mn+6n^2-438的值是m^2+2mn=384,3mn+2n^2=560,则2m^2+13mn+6n^2-438的值是m^2+2m
m^2+2mn=384,3mn+2n^2=560,则2m^2+13mn+6n^2-438的值是
m^2+2mn=384,3mn+2n^2=560,则2m^2+13mn+6n^2-438的值是
m^2+2mn=384,3mn+2n^2=560,则2m^2+13mn+6n^2-438的值是
m^2+2mn=384,3mn+2n^2=560
2m²+4mn=768 9mn+6n²=1680
2m²+4mn+9mn+6n²=768+1680
2m²+13mn+6n²=2448
∴2m²+13mn+6n²-438=2448-438=2010
已知m+n=3,mn=2/3,求mn-mn+mn的值
急2[mn+(-3m)]-3(2n-mn),m+n=2 mn=-3
已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值
2mn[（2mn）^2-3n（mn+m^2*n）-mn^2]计算
2mn[(2mn)²-3n（mn+m²n）-mn²
已知MN^2=-6,求-MN(M^2N^5-MN^3-N)的值
已知mn/m+n=2求3m-5mn+3n/-m+3mn-n
已知M+N分之MN=2,求-m+3mn-n分之3m-5mn+3n
已知mn/m+n=2,求3m-5mn+3n/（-m）+3mn-n
已知mn／m+n=2,求3m-5mn+3n/-m+3mn-n的值
(5mn-2m+3n)+(-7m-7mn)
(5mn-2m+3n)+(-7m-7mn)
m-n=7 mn=-5求(3m+5n+4mn)-(2n-4n+6mn)
1/M+1/N=5 (3M+MN+2N) / (M-MN=3N)
已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
【 】÷【mn】=2m-3n
已知m-n=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值