1.已知,x-2xy+y=0.求(3x-5xy+3y)/(-x+3xy-y)的值
1.已知,x-2xy+y=0.求(3x-5xy+3y)/(-x+3xy-y)的值
已知xy^2=-2,求-xy(x^2y^5-xy^3-y)的值.
已知xy/x+y=2,求代数式3x-5xy+3y/-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
已知x-y=4,xy=-2,求代数式(2x+3y-2xy)-(x+4+xy)-(3xy+2y-2x)的值
1.已知x+y=-4,xy=3,求5(2分之1xy+2y)+[6x-(2xy+y-3x)]的值
已知x-y=6,xy=-2,求3(xy+x-2y)-5(y-2x)+2(xy-x)的值.
已知xy^2=-6,求-xy(x^3y^7-3x^2y^5-y)的值
已知xy=2,x+y=3,求(3xy+10y)+[5x-(2xy+2y-3x)]的值.
已知:x+y=3,xy=-2,求(3x-4y+2xy)-(2x-5y+5xy)的值.
亲们~已知xy=-2,x+y=3,求(3xy+10y)+[5x-(2xy+2y-3x)] 的值