Adding

The four main operations of addition, subtraction, multiplication, and division can also be performed with functions. To add functions, combine like terms.

Example Given f(x) = 2x2 and g(x) = 3x2+ 1, what is f(x) + g(x)?

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