将(√x-y)/(x-y)÷√(xy/x³-x²y)(x>y>0)化简
将(√x-y)/(x-y)÷√(xy/x³-x²y)(x>y>0)化简
[x(x²y²-xy)-y(x²-x³y)]÷3x²y
因式分解:[x(x²y²-xy)-y(x²-x³y)]÷3x²y
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
(√xy -xy分之x+√xy)除以√xy -y分之x-y(x>0,y.0)
化简:(根号xy)-(根号x/y)+(根号y/x)+(根号x/y+y/x+2)(x、y>0)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/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.
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
化简(y根号x+x根号y)/(xy-y²)-(x+根号xy+y)/(x根号x-y根号y).
化简:[(x×根号x+x×根号y)/(xy-y²)]-[(x+根号下xy+y)/(x×根号x-y×根号y)]