解方程组 x^2+2xy+y^2=9,(x-y)^2-4(x-y)+3=0
求方程组的解,方程组xy/(2x+y)-xy/(2x-y)=3,xy/(2x-y)+xy/(2x+y)=4
解方程组 x^2+2xy+y^2=9,(x-y)^2-4(x-y)+3=0
解方程组2x*+2xy+4y*+x=19;x*+xy+2y*-y=9
(x-2)(y+3)=xy (x-5)(y+2)=xy 解方程组
解方程组:3x^2-y=8& x^2+xy+y=4
解方程组x^2+3xy-4y^2=0,x^2-4xy+4y^2=25
解方程组 4x^2-y=0 3x^2+xy+x-2y+6=0
解方程组①x+3y=7②x²-9y²=-35 解方程组①x²-xy-2y²=0②
解方程组 xy=1 x-y=3/2
解方程组:(x-1)(y-2)=xy和x(x+2)-4y(y-1)=(x+2y)(x-2y)
解方程组{(x-1)(y-2)=xy {x(x+2)-4y(y-1)=(x-2y)(x+2y)
解方程组:(x-1)(y-2)=xy,x(x+2)-4y(y-1)=(x+2y)(x-2y)