若实数x,y满足xy+x+y+7=0,3x+3y=9+2xy,则x2y+xy2=______.
若实数x,y满足xy+x+y+7=0,3x+3y=9+2xy,则x2y+xy2=______.
数学竞赛题:若实数x,y满足方程组xy+x+y+7=0,3x+3y=9+2xy,则x2y+xy2=?
若x-y=3,xy=-2,则xy2-x2y的值是______.
若x+y=5,xy=6,则x2y+xy2的值为______.
已知实数x、y满足x+y+xy=9,x2y+xy2=20,求x2+y2的值.
已知x、y均为实数,且满足xy+x+y=17,x2y+xy2=66,则x4+x3y+x2y2+xy3+y4=______
已知x+y=6,xy=4,则x2y+xy2的值为______.
如果2x+y=4,xy=3,那么2x2y+xy2的值为______.
已知x、y均为实数,且满足xy+x+y=17,x2y+xy2=66,求x2+y2
已知x+y=-5,xy=7,求x2y+xy2-x-y的值.
如果x+y=0,xy=-7,x2y+xy2=______,x2+y2=______.
已知x+y=6,xy=-3,则x2y+xy2=