Adding & Subtracting
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)?
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