化简:(x+y)÷(√x-√y)-2xy÷(x√y-y√x)
化简:(x+y)÷(√x-√y)-2xy÷(x√y-y√x)
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
第一题:化简:[(x+y+2√xy)÷(x+√xy)]÷[(√x÷x)+(√y÷y)]
将(√x-y)/(x-y)÷√(xy/x³-x²y)(x>y>0)化简
√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y
化简:[(x+y)²-(x-y)²]÷2xy
已知实数x,y满足关系式| x+y-7 |+√(xy-6)=6,求(x+2y)÷(y-x)的值
计算:(x+y/x-y)÷(xy+x^2)
(x^2-xy)y÷y-x/xy怎么做?
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
已知y=√(x-8)+√(8-x)+18,求代数式 (x+y)/(√x-√y)-2xy/(x√x-y√x) 的值
解方程xy'=(√x^2-y^2)+y