If f(n) = n 2 - 2n, then f(2) = 0. true or false ?

It is true because it gives you zero. You plug in 2 for n and then you simplify and get 2(2)-2(2) and that would get you 4-4 which is 0. Hope this helps.

This is true because it does give you zero 0

These graph is cross the yaxis and x axis two ways.