已知m-n=4,mn=2,求多项式(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/02 20:37:41
已知m-n=4,mn=2,求多项式(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
已知m-n=4,mn=2,求多项式(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
已知m-n=4,mn=2,求多项式(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
原式=-2mn+2m+3n-3mn-2n+2n-m-4n-mn
=-6mn+m-n
=-6×2+4
=-8
(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)
=-2mn+2m+3n-3mn-2n+2n-m-4n-mn
=-6mn+m-n
把m-n=4,mn=2代入上式:
原式=-6×2+4
=-8
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
已知m-n=4,mn=2,求多项式(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
已知m-n=4,mn=2,求多项式(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值.
已知m-n=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-n=3,mn=-1,求多项式-2mn+2m+3n-3mn-2n+2m-4n-m-mn的值
已知M-N=3,MN=1,求多项式多项式(-2MN+2M+3N)-(3MN+2N-2M)-(M+4N+MN)的值.
已知m+n=3,求多项式2m的平方+4mn+2n的平方-3m+1
已知m+n=3,mn=-2,求多项式2(mn+m) -[-(3n-mn)-m] -m] +mn]的值
已知m+n=3,mn=-2,求多项式2(mn+m)-[-(3n-mn)-m]+mn的值(先化简,再求值)
已知m-n=2,mn=1,求多项式(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-n=2,mn=1,求多项式(负2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-n=2,mn=1.求多项式(-2mn+2m+3n)-(3mn+2n-2m)
已知:3^m-n-1=27,求多项式m^2+mn-2n^2-10m-2n+24
已知m+n=-4 mn=2求mn
已知m^2+n^2=3,mn=-1,求多项式5m^2-3mn+12mn-7m^2+5n^2的值.
已知m+n=-2,mn=3,求多项式2(mn+m)-【-(3n-mn)-m】的值
已知m+n=3求多项式2m^2+4mn+2n^2-3m-3n+1一样要有方法==