y-x分之x²-2xy+y²= (分式)
x+2y=0(x≠0),求分式x²-xy分之2xy+y²
已知 3X-4y=0 求分式3x²-y²分之x²+2xy
分式计算:(x²+2xy+y²)/(x²y+xy)*y/(x+y)
已知分式x²+3分之x-2y的值为0,求分式x²-y²分之x²-3xy-4y
化成最简分式:x²-xy-6y²分之x²+xy-2y²
当x=3,y=7时,求分式(xy+2y)-(x-2)分之x²-4的值
分式(x²-y²\xy)-(xy-y²\xy-x²)可化简为
已知x+2y=0(x≠0),求分式x²-xy分之2xy+y²的值
化简分式2y-xy分之x的²-2x
若x²+y²-2x-6y+10=0,求分式x²-y²分之xy的值
如果y分之x=2,那么分式xy分之(x的平方+y的平方)的值为
若x+2y=0,xy不等于0,求分式x²+2xy/xy+y²的值