已知(x+y-10)²+根号xy-6=0,求x³y-2x²y²+xy³
已知(x+y-10)²+根号xy-6=0,求x³y-2x²y²+xy³
已知(4x-2y-1)²+根号(xy-2)=0,求4x³y-4x²y²+xy
已知x+y=2,xy=1/2,求x³y+2x²y²+xy³
已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y
已知x-y=根号5,xy=二分之一,求x²-xy+y²
已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
2x+y=0,求4x²+2xy(x+y)+y³
已知x>0,y>0,x+根号xy-6y=0,求4x+5根号xy-6y分之x+2根号xy
已知x+y=根号3+根号2,xy=根号6,求x²+y²的值.
已知X²+Y²+X²Y²-4XY+1=0 求:(X-Y)^2008-(XY)^2
已知x/y=2,求x²-xy+3y²/x²+xy+6y²的值