Q: Classify and find f(2): (a) f(x) = 5 (b) f(x) = x (c) f(x) = 3x^2 - 2x + 1. (a) Constant: f(2) = 5. (b) Identity: f(2) = 2. (c) Quadratic polynomial: f(2) = 12 - 4 + 1 = 9.