Find f + g, f - g, fo, and f/g and their domains. Rx) = x2 + 4x, g(x) =7x2-1 Find (f + g) (x). Find the domain of (f + g)(x). (Enter your answer using interval notation.) Find (f - g)(x). Find the domain of (f - g)(x). (Enter your answer using Interval notation.) Find (fg) (x). Find the domain of (fg)(x). (Enter your answer using interval notation.) Find ( )(x)