若x²-6xy+8y²=0(XY≠0)则x:y=
若x²-6xy+8y²=0(XY≠0)则x:y=
已知2x²-3y²=xy,(xy≠0),求值(4xy-x²)/(xy+2y²)的
若x²+y²-4x+6y+13=0,则x²+6xy+9y²=( )
已知X²+Y²-8X-10Y+41=0,求Y/(X²-XY)+X/(Y²-XY)
已知X²-5XY+6Y²=0,求(X²+3XY)\2Y²的值
已知x²+y²=3xy且xy≠0,求x²y-²+x-²y²的
已知x²-xy-y²=0,且x≠0,y≠0.求代数式(x²-2xy-5y²)/(
x²+y²+4x-8y+20=0,求分式x²-y²/xy的值
x²+y²+4x-8y+20=0,求(x²-y²)÷xy的解
|x+2y+3|+(2x+y)²=0求x²-xy+y²
若4x²+4xy+2y²+6y+9=0,则x-y=_____
已知xy≠0,且3x²-2xy-8y²=0,求x/y的值