若|x+y-5|+(xy-6)^2=0则x^2+y^2=

若(x+y-5)²+(xy-6)²=0,则（x+y)²-2xy的值为? 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 若xy/x+y=2,则3x-5xy+3y/-x+3xy-y=?/是分之 若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)= 已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y) 若|x+y-5|+(xy-6)^2=0则x^2+y^2= 若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2 若 x+y=5,xy=-50 则x^2y+xy^2 =( ) 若x-y=1,xy=5,则x^2y-xy^2＝ 若x+y=5,xy=6,求x^2y+xy^2的值 若x-y=5,xy=6,则xy-xy是多少 已知x+y=2xy,且xy不等于0,则求-2x+6xy-2y/(7x+5y)-9xy-(3x+y)=___ 若x-y=5,xy=6,则x^2y-xy^2=_,x^2+xy^2=__ 已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值 化简求值,若X方-2XY+Y方+1XY-11=0,求X方+6XY+9Y方分之X方-25Y方*5X-25Y分之X+3Y的值 若2x^2-6xy+9y^2-4x+4=0,则y/x-x/y=若2x^2-6xy+9y^2-4x+4=0,则y/x-x/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 若y-2x=0,则分式(x^2+xy+y^2)/(x^2-xy+2y^2)=