已知x²+y²-2xy-6xy= -10
已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y
已知x:y=3:2,求(x²+3xy)/(xy+2xy)
已知2x²+xy=10,3y²+2xy=6,求4x²+8xy+9y²的值
已知(x+1)²+|y-1|=0,求2(xy-5xy²)-(3xy²-xy)得值
已知x/y=2,求x²-xy+3y²/x²+xy+6y²的值
已知x/y=3,求(x²+2xy-3xy²)/(x²-xy+y²)
已知x/2=y/3(xy≠0),求x²-2xy-3y²/x²-6xy-7y²的值
已知xy²=-6,求xy(x^3y^7-3x^2y^5-11.5y)的值
已知x²-7xy+12y²=0求x²-xy+y²/2xy的值
已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy
已知:X+Y=-3,XY=2,X²Y+XY²
已知x²-10x+25+|y-3|=0,求2xy+xy分之x²+x的值