presleykhoranoff presleykhoranoff 10-09-2021 Mathematics contestada for f(X) = 3X + 1 and g(X) = x2 - 6, find ( f+g ) (X)A: X2 + 3X - 5B: 3X3 - 5 C: 3X2 -17 D: X2 + 3X + 7