AddingThe four main operations of addition, subtraction, multiplication, and division can also be performed with functions. To add functions, combine like terms.
Step 1. Replace f(x) and g(x) with their equivalent expressions.
f(x) + g(x)
(2x2) + (3x2 + 1)
Step 2. Eliminate the parentheses and combine like terms.
2x2 + 3x2 + 1
5x2 + 1