Question

find f(3) if f(x)=3^3+2x^2-x-1. If possible please show me how to solve this.

Answer 1

basically, you are just going to sub in 3 everywhere there is an x.
f(3) = 3^3 + 2(3^2) - 3 - 1
f(3) = 27 + 2(9) - 4
f(3) = 27 + 18 - 4
f(3) = 45 - 4
f(3) = 41

Answer 2

okay, thanks. Math is not my best subject.