已知(x+2y+2m)(2x-y+n)=2x方+3xy-2y方+5y-2,求m,n

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已知(x+2y+2m)(2x-y+n)=2x方+3xy-2y方+5y-2,求m,n已知(x+2y+2m)(2x-y+n)=2x方+3xy-2y方+5y-2,求m,n已知(x+2y+2m)(2x-y+n

已知(x+2y+2m)(2x-y+n)=2x方+3xy-2y方+5y-2,求m,n
已知(x+2y+2m)(2x-y+n)=2x方+3xy-2y方+5y-2,求m,n

已知(x+2y+2m)(2x-y+n)=2x方+3xy-2y方+5y-2,求m,n
从式子可知,
4m+n=0(从x项看出),2n-2m=5(从y项看出),
解得m=-1/2,n=2.