化简√x³+6x²y+9xy²(x>=0,y>=0)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
将(√x-y)/(x-y)÷√(xy/x³-x²y)(x>y>0)化简
2x+y=0,求4x²+2xy(x+y)+y³
已知x>0,y>0,x-5√xy -6y=0,求代数式(4x+√xy +3y)÷(9x+5√xy +6y)的值
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
x²-6y²=﹣xy 且x>0,y>0 求分式x+3y/x-y的值
若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求(2x+2√xy+3y)/(x-√xy+y)的值.
已知2x+y=0,求x-2y/x²+xy*(x²-y²)/x²-4xy+4y
已知x²+y²-2xy-6x+6y+9=0,求x+y的值
已知x²+y-2xy-6x+6y+9=0,求x-y的值
已知x/2=y/3(xy≠0),求x²-2xy-3y²/x²-6xy-7y²的值