若5x^2-7xy-6y^2=0,求5x/3y的值
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
若(3xy+2)+|7-x-y|=0,求代数式(5xy+10y)-[-5x-(4xy-2y+3x)]的值.
x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值
已知xy^2=-6,求-xy(x^3y^7-3x^2y^5-y)的值
已知xy²=-6,求xy(x^3y^7-3x^2y^5-11.5y)的值
若x+y=5,xy=6,求x^2y+xy^2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1/x-1/y=3,求5x+2xy-5y/x-4xy-y的值
已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值.
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
已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值
已知xy=2(x+y),求(5x-xy+5y)/(3xy-x-y)的值