如果2x+y=4,xy=3,那么2x2y+xy2的值为______.
如果2x+y=4,xy=3,那么2x2y+xy2的值为______.
若x-y=3,xy=-2,则xy2-x2y的值是______.
已知x+y=6,xy=4,则x2y+xy2的值为______.
若x+y=5,xy=6,则x2y+xy2的值为______.
若x+y=2,xy=-4,求x2y+xy2+1的值
已知x+2y=5,xy=1.则2x2y+4xy2=______.
若实数x,y满足xy+x+y+7=0,3x+3y=9+2xy,则x2y+xy2=______.
x+y=5,xy=2,求代数式-x2y-xy2的值
如果x+y=0,xy=-7,x2y+xy2=______,x2+y2=______.
已知(x+3)2+▕x-y+10▏=0求代数式5x2y-【2x2-(3xy-xy2)-3x2】-2xy2-y2的值.
已知(x-2)2+|y+1|=0,求5xy2-[2x2y-(3xy2-2x2y)]的值.
已知x+y=-5,xy=7,求x2y+xy2-x-y的值.