若x+y=4 x-y=6 求xy(x^2+y)-y^2(xy+2x)-3xy的值求值

若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 若x+y=4 x-y=6 求xy(x^2+y)-y^2(xy+2x)-3xy的值求值 1-2/x+y=xy,4y+6x=xy.求xy的解? 若x+y=4,x-y=6,求xy(y^2+y)-y^2(xy+2x)-3xy的值. 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 若x^2+xy+y=14,y^2+xy+x=28,求x+y 若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值 x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 若x+y=4,x^3+y^3=(x+y)(x^2-xy+y^2)z,求x^3+12xy+y^3的值. 若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思，是3x-2xy-3y/x-2xy-y 已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y² 若x+y=5,xy=6,求x^2y+xy^2的值 若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2 已知x+y=6,xy=4,求x^2y+xy^2的值~ 若正实数x,y满足2x+y+6=xy,求xy的最小值. 若正实数X,Y满足2X+Y+6=XY,求XY的最小值. 已知x+y=-2,求代数式(6xy+10y)+[4x-2(3xy+2y-x)]