If you click twice on the code button then type between the boxes things will look better.
0 = ----- x(x-260)
Or you can add your own ()s for clarity.
0 = (-3/260)*x*(x-260)
means the same thing.
Actually what you wrote was fine, it is just that so many people would write that when they mean -3/(260*x*(x-260)) that we get suspicious.
Divide by (-3/260) to get
0 = x(x-260)
For that to be true either
x = 0
or x = 260
The x intercepts are 0 and 260.
(Not (0,260) Maybe a long time ago but now that means the point where x=0 and y=260)