（3x/2 √x/y - 2/5 √3/xy + 1/3 √xy/2 ) ÷ x/2 √ x/y

√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y 已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
（3x/2 √x/y - 2/5 √3/xy + 1/3 √xy/2 ) ÷ x/2 √ x/y 计算3xy[2xy-x(y-2)+x-1] (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) 1.若x-2√xy-3y=0 x>0求2x+y+√xy除以y-x-√xy 先化简再求值(6x√y/x +3/y*√xy^3)-(4x√x/y +√36xy) 已知X=3/2,y=27 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 计算：(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3 已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y= 5x^2y/-1/2xy*3xy^2