若2x^2+9xy-5y^2=0(y≠0),求x/y的值

若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 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2x^2+9xy-5y^2=0(y≠0),求x/y的值 已知X-XY-2Y=0求2X+3XY-Y/X-2XY+5Y x^2-4xy+5y^2+6y+9=0,x+y= 若x²-4xy+5y²-2y+1=0,求x,y 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+y=0,求(x^2+xy+y^2)/(2xy-x^2) 若2x方+9xy-5y方=0,则x除以y= 若集合{x,xy,lg(xy)}={0,|x|,y},求log8(x^2+y^2) 若3x^2+xy-2y^2=0,求（x+y/x-y+4xy/y^2-x^2)除以(x^2+2xy-3y^2/x^2-9y^2)的值 已知x^2+9y^2-2x-6y+2=0,求{-（xy/（x-y）^2}^4*(y^2-xy/x)^3*x^4/y^10/(x/xy-y^2)^5的值 若（x+1)^2+|y-2|=0,求3x^2-[5xy-(x^2y-3xy)+4x^2y-8xy]的值 (x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 若(3xy+2)^2+|7-x-y|=0,求代数式(5xy+10y)-[-5x-(4xy-2y+3x)]的值 若(3xy+2)+|7-x-y|=0,求代数式（5xy+10y）-[-5x-（4xy-2y+3x）]的值. 若X+Y=0,XY=11,求X^2-XY+Y^2的值.