x²-3xy+2y²=0,则x:y是?
|x+2y+3|+(2x+y)²=0求x²-xy+y²
已知X²-5XY+6Y²=0,求(X²+3XY)\2Y²的值
已知3x²+xy-2y²=0(x≠0,y≠0),求x/y-y/x-x²+y²/x
已知x/y=3,求x²+2xy-3y²/x²-2xy+y²
已知x/y=3,求x²+2xy-3y²/x²-xy+y²的值
x/y=2,求分式x²-xy+3y²/x²+xy+6y²
方程组{x²+y²=10(1)x²-3xy+2y²=0(2)怎么解
计算:(1).(-2xy²)*(3x²y)²
若x/y=2,求7x²-3xy+2y²/2x²-3xy+7y²的值 答案是8/3
已知x²+y²=3xy且xy≠0,求x²y-²+x-²y²的
已知X²+XY=3,XY+Y²=2,则代数式X²+2xy的值为
已知2x²-3y²=xy,(xy≠0),求值(4xy-x²)/(xy+2y²)的