60028709 60028709 17-10-2022 Mathematics Answered The domain for f(x) and g(x) is the set of all real numbers. Let fix)=x²+1 and g(x) = 3x. Find f-g- A. x²+3x+1 B. 3x³ +3x+1 C. x² + 3x D. x²-3x+1