已知,x=√3+√2,y=√3-√2,求3x²-√xy+3y³
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
已知|x²-2xy-8y²|+2√x²-4xy+4y²-1=0,求3x+6y的值
√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y
已知x,y为正数,且√x(√x+√y)=3√y(√x+5√y),求(2x+√xy+3y)/(x+√xy-y)
先化简再求值(6x√y/x +3/y*√xy^3)-(4x√x/y +√36xy) 已知X=3/2,y=27
已知实数x,y满足x^2+√2y=√3,y^2+√2x=√3,求x+y和xy的值
已知x=1+√2,y=1-√2,求x²-3xy+y²的值
已知√x+y-3+绝对值xy+x+y-2l =0求x/y+y/x的值(初一)
已知√x-2+|2x-y-3|=0 试求2x^2y+xy^2的平方根
1) 已知x=√3,y=-1,求x²+2y²-xy的值
1.若x-2√xy-3y=0 x>0求2x+y+√xy除以y-x-√xy
已知x-y=(1+√3)/2,z-y=(1-√3)/2,求x²+y²+z²-xy-yz-x