已知（x+y-10)²+√(xy-6)=0求x³y-2x²y²+xy³

已知（x+y-10)²+根号xy-6=0,求x³y-2x²y²+xy³ 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2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
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 已知x²+y²-2x+4y+5=0,求X^4-y^4/2x^2+xy-y²·2x-y/xy 已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y² 已知x/2=y/3（xy≠0）,求x²-2xy-3y²/x²-6xy-7y²的值 已知x²-7xy+12y²=0求x²-xy+y²/2xy的值