已知x=√3+√2/√3-√2,y=√3-√2/√3+√2,求x^3-xy^2/x^4y+2x^3y^2+x^2y^3

√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y 先化简再求值(6x√y/x +3/y*√xy^3)-(4x√x/y +√36xy) 已知X=3/2,y=27 已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
已知x,y为正数,且√x(√x+√y)=3√y(√x+5√y),求(2x+√xy+3y)/(x+√xy-y) 已知实数x,y满足x^2+√2y=√3,y^2+√2x=√3,求x+y和xy的值 已知√x+y-3+绝对值xy+x+y-2l =0求x/y+y/x的值（初一） 设√x(√x-√y)=√xy+3y,求2x+3√xy-y/3x-y的值. 已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)} 若x＞0,y＞0,且√x(√x+√y)=3√y（√x+5√y）,求（2x+2√xy+3y）/（x-√xy+y）的值. 若x、y为整数,√x（√x+√y）=3√y（√x+5√y),试求2x+(√xy)+3y除以x+(√xy)+y 当x>0,y>0且√x(√x+√y)=3√y(√x+5√y),求2x+(√xy)+3y/x+(√xy)-y的值 已知√x-2+|2x-y-3|=0 试求2x^2y+xy^2的平方根