｛2x+y=4-m x+2y=2+3m 当x+y＞0 求m的区间

关于X,Y的方程组3X+2Y=2m+5与x-y=4m-5的解x,y满足x+2y (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= 4m(x-y)-2m^2(y-x)^3 填空：1.（1）2m（y-x）^2=（ )(x-y)^2填空：1.（1）2m（y-x）^2=（ )(x-y)^2（2）-2m(y-x)^3=( )(x-y)^3( 3 ) (x+y)(y-x)=-(x+y)( )( 4 ) -m(y-x^2)=m( ) 数学计算填空(5x+y)(5x-y)(5x+y)(-5x+y)(5x+y)(-5x-y)(5x+y)(x-5y)(x ^m+y ^n) （y ^n- x^ m)(x ^m+2y-3x^3)²(x-2y）(______)=4y²-x²(__________)²=m²-2m+1（只需要写一个代数式）(__________+3)²=4x²+(_______) 已知方程组{4x+y=3m 2x-2y=9m,求x+y+m/3x-2y的值. 已知x.y满足2x-y=3m,x+2y=4m+5,且x+y=0,求m的值 已知x,y满足2x-7y=3m,x+2y=4m+5,且x+y=o,求m的值 已知x,y满足2x-y=3m,x+2y=4m+5,且x+y=0,求m的值快 已知X、Y满足2X-7Y=3M,X+2Y=4m+5,且X+Y=0,求M的值 已知x.y满足2x-y=3m,x+2y=4m+5,且x+y=9,求m的值 整体求值 已知方程组x+2y=2m+7,2x-y=4m-3;且x-3y 关于x,y的方程组{3x+2y=m+1 4x+y=m},x、y小于2,求m的范围 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 已知x+2y=3-m,且2x+y=-m+4,则x-y的值是? 已知x+2y=3-m,且2x+y=-m+4,则x-y的值是几 若方程组x+y=-m,2x+3y=3m-4的解x>0,y 1、x+2y+z=4x+y+z=102x+3y-z=12、2x-3y+4m=113x+2y+5m=21x+3y+7m=20