已知x+y=3,x²+y²-3xy=4, yx^3+xy^3=_____
已知x-y=4xy,则2x+3xy-2yx-2xy-y
若x+y=4,xy=3,求yx
已知y=3xy+x,求代数式2x+3xy−2yx−2xy−y
已知3x2+xy-2y2=0,求(x+yx-y+4xyy
3xy+xy+2x²y+yx²+3x²y等于多少
已知2x2-xy-3y2=0,求x−yx+y
已知x2+3xy-4y2=0(y≠0),则x−yx+y
实数x、y、z满足x=6-3yx+3y-2xy+2z
已知x:y=3:2,求(x²+3xy)/(xy+2xy)
xy+yx=10x,y是多少
已知1x-1y=3,则分式2x+3xy-2yx-2xy-y的值为( )
已知1x−1y=3,则5x+xy−5yx−xy−y的值为( )