若x>0,y>0,切x-√(xy)-2y=0,求2x-√(xy)/(y+2)√(xy)的值
若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求(2x+2√xy+3y)/(x-√xy+y)的值.
已知x>0,y>0,且x-2√xy-15y=0,求(2x+√xy+3y)÷(x+√xy-y)的值
已知:x²+y²-4x-2y+5=0,求x+√xy分之(√x-√y)²+4√xy的值.
若(3xy+2)+|7-x-y|=0,求代数式(5xy+10y)-[-5x-(4xy-2y+3x)]的值.
已知x^2+xy-2y^2=0 (x不等于0,y不等于0),求x/y-y/x-(x^2+y^2)/xy的值
(√xy -xy分之x+√xy)除以√xy -y分之x-y(x>0,y.0)
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
已知x>0,y>0,且x-2√xy-15y=0,求(x+(√xy)-y)分之2x+√xy+3y的值
已知(x+2)*+|y+1|=0求5xy*-{2x*y-【3xy*-(4xy*-2x*y)】}的值
已知x/2=y/3(xy≠0),求x²-2xy-3y²/x²-6xy-7y²的值
已知X—根号3XY-4Y=0,求(2X+3根号XY-2Y)/(3X-根号XY+Y)的值
若x>0,y>0,且x-(√xy)-2y=0,求x/y的值