Answer:
x^2 + 3x
Step-by-step explanation:
Just add like terms:
(f + g)(x) = 3x - 1 + x^2 + 1. Notice that you must use " ^ " or equivalent to denote exponentiation.
(f + g)(x) = 3x - 1 + x^2 + 1 = x^2 + 3x + 1 - 1
(f + g)(x) = 3x - 1 + x^2 + 1 = x^2 + 3x
