已知√x+√y=√5+√3,√xy=√15-√3,则x+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x,y为正数,且√x(√x+√y)=3√y(√x+5√y),求(2x+√xy+3y)/(x+√xy-y)
√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y
已知y=√(x-3 )+ √(3-x )+5则x^-xy+y^=?
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
帮个忙啦 已知x+y=-6 xy=8 求√y/x+√x/y
1.已知x>0,y>0,且x+3y=4√xy,求√xy+y分之x+√xy
已知x+y=3,xy=6.求√x分之y+√y分之x的值
已知非零实数x、y满足x-5(√xy)-6y=0,则x/y
已知y=√X-3+√3-X+5,求X²-XY+y²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x>0,y>0,且x-2√xy-15y=0,求(x+(√xy)-y)分之2x+√xy+3y的值