Answer:
2x^3 + 2x^2 - x - 10
Step-by-step explanation:
(f + g)(x) = f(x) + g(x)
f(x) + g(x) = x^3 + x^3 + 2x^2 - x - 10
Combine like terms.
f(x) + g(x) = 2x^3 + 2x^2 - x - 10
Since we made it clear that f(x) + g(x) = (f + g)(x)...
(f + g)(x) = 2x^3 + 2x^2 - x - 10
