若x+2y=0,xy不等于0,求分式x²+2xy/xy+y²的值
问题描述:
若x+2y=0,xy不等于0,求分式x²+2xy/xy+y²的值
答
x+2y=0,xy不等于0
∴x=-2y
x²+2xy/xy+y²
=(4y²-4y²)/(-2y²+y²)
=0