X+Y=-1,XY=3求5(XY+2Y)+(6X-(2XY+Y-3X))的值
已知xy^2=-2,求-xy(x^2y^5-xy^3-y)的值.
已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值.
已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
已知x-y=2xy,求代数式3x-5xy-3y/x+xy-y的值
已知xy=2(x+y),求(5x-xy+5y)/(3xy-x-y)的值
x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值
已知:x-y=1,xy=-2.求:(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
x-y=1,xy=2.求:(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
.已知:x-y=1,xy=-2.求:(-2xy+2 x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值