X-y/XX-yy=1/x-y是不是分式哦
xx-yy-x-y 因式分解
(x-y)(x+y)(xx-yy)=?
XX-YY/(X-Y)(X-Y)约分
x y x+yy x+y xx+y x y
((xx+yy)/y-2y)/(1/y-1/x)^(1/(xx-yy))
已知2x=3y,求xy/xx+yy-yy/xx-yy的值
已知x(x+1)-(xx+y)=3,求(xx+yy)/2-xy的值
x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值
已知xx+yy+4x-6y+13=0,求(xx-2x)/xx+3yy的值.
分式定义这个是不是分式 (1/x)+y
已知x,y是实数,且适合方程(xx+xy-12)(xx+xy-12)+(xy-2yy-1)(xy-2yy-1)=0求x,
已知(x+y)(x+y)=25,(x-y)(x-y)=9求xy与xx+yy的值