f(x)=8 x^2 + x - 3 f(x+1)

*ah i cant get this one please help!

f(x) = 8x^2 + x - 3

So f(c) = 8c^2 + c - 3. Substitute c for x.

To find f(x+1), substitute in x+1 for x, just as I did for f(c).