Question

If f(x) and g(x) are polynomial functions, what is the domain of f(x) + g(x) ?

Answer 1

all real numbers or
`(-\infty, \infty)`

Explanation:

since both f(x) and g(x) are polynomials, neither of them have restrictions on their domains. Since they can be defined for all real numbers. It's not like the square root which has a domain of (0, infinity), or log x which is defined only from (0, infinity). So adding these two polynomials would result in a domain of all real numbers.