若x^y-2xy+y+x^2-2x=1983,求满足条件的整数对(x,y)....

若x^2+xy+y=14,y^2+xy+x=28,求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(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 (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) （x^2+xy/x-y)/（xy/x-y)计算 f(xy,x-y)=x^2+y^2+xy;f(x,y)/∂x;f(x,y)/∂y 若2x+y=0,求(x^2+xy+y^2)/(2xy-x^2) 若集合{x,xy,lg(xy)}={0,|x|,y},求log8(x^2+y^2) 若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值 若y-x/xy=3,求分式2x+3xy-2y/x-2xy-y 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________? 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=