若x+y=5,xy=6,求x²y+xy²的值
若x²+xy+5y=3,y²+xy+5x=-3,求x+y的值.
若x²+xy+5y=3,y²+xy+5x=-3,求x+y的值
若x+y=5,xy=6,求x^2y+xy^2的值
已知xy²=-6,求xy(x^3y^7-3x^2y^5-11.5y)的值
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
若x+2y=0,xy不等于0,求分式x²+2xy/xy+y²的值
已知x/y=2,求x²-xy+3y²/x²+xy+6y²的值
已知实数x,y,xy=5,x+y=7,求代数式x²y+xy²的值
1/x+1/y=5,求2x-3xy+2y/x²+xy+y的值
已知x/2=y/3(xy≠0),求x²-2xy-3y²/x²-6xy-7y²的值
已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值
已知x+y=3,xy=1,求代数式5xy+4x+7y+6x-3xy-4xy+3y的值.