若x=(2+√3)/(2-√3),y=(2-√3)/(2+√3),求2x²;-3xy+2y²;

已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y 1.若x-2√xy-3y=0 x>0求2x+y+√xy除以y-x-√xy 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=1/2,y=1 求x(x²+xy+y²)-y(x²+xy+y²)+3xy( 若x、y为整数,√x（√x+√y）=3√y（√x+5√y),试求2x+(√xy)+3y除以x+(√xy)+y 设√x(√x-√y)=√xy+3y,求2x+3√xy-y/3x-y的值. 已知|x²-2xy-8y²|+2√x²-4xy+4y²-1=0,求3x+6y的值 若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值 若y-x/xy=3,求分式2x+3xy-2y/x-2xy-y 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 2x²-3xy=y²=0（x,y不得o）求x/y+y/x