若x+y=5,x^2+y^2=13,则x^2y+2x^2y^2+xy^2=_________-

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) 若f(x+y,y/x)=x^2-y^2,则F(X,Y)= 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 若2x=3y,则(x*x+y*y)/x*x=? 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 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝ 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 若2x-5y=0,则y：x 若5x+3y=3x+4y=x+2y+6,则x+y=___ 若【x+y=5,2x+y=8】,则x+2y= 若x^2-y^2=40,(x+y)=8/5,则x-y= 若|x+y-3|+(x-y-5)^2=0,则x)^2-y^2= 若x/y=4/3 则3x+2y/2x-5y= 若(3x-2y)/(x+y)=2/3,则3x/5y= (5)若x/2=y/3(y不为0）则x/y=____,x+y/y=___,y/x-y=___.