若x+y=0,xy=-6则x^3y+xy^3的值是(请写过程)

已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y) 若x+y=0,xy=-3则x^3y+xy^3=? |x|/x+y/|y|+xy/|xy|= 若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少? 若xy/x+y=2,则3x-5xy+3y/-x+3xy-y=?/是分之 若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少? 若xy/x+y=2,则3x-xy+3y/-x+3xy-y= 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 若|x|/y+y/|y|=0,则|xy|/xy=?是：若|x|/x+y/|y|=0，则|xy|/xy=？ 若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)= 若x²+xy-2y²=0,则x²+3xy+y²/x²+y² x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________? 若x+y=0,xy=-6则x^3y+xy^3的值是(请写过程) 若|x-3|+（y+2）=0,则（x-y+4xy/x-y）（x+y-4xy/x+y）的值是 若|x-3|+（y+2）²=0,则（x-y+4xy/x-y）（x+y-4xy/x+y）的值是 若x>0,y>0,且x-根号xy=6y,则x/y= 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 若3x^2+3xy=0且xy不等于0,则x:y=