How do you find the domain?

I really don't understand how to find the domain given the context of the question... If I was just given variables, it'd make sense, but it's simply confusing.

x^2-5x+8 + x^2-4

Question

How do you find the domain? 

I really don't understand how to find the domain given the context of the question... If I was just given variables, it'd make sense, but it's simply confusing.


x^2-5x+8 + x^2-4

anonymous · Answer

Please, someone help.

hartnn · Answer

is the question, really this : 
$x^2-5x+8 + x^2-4$ ?? 
if so, its a polynomial and domain of polynomials is all real numbers.

amistre64 · Answer

might be a typo, check if the question is not:$$\frac{x^2+5x+8}{x^2-4}$$or maybe its written in your material as:$${x^2+5x+8}~\div~{x^2-4}$$

amistre64 · Answer

if so, then think about what math people hate to divide by .... and see what makes the bottom equal that value

hartnn · Answer

yeah, then i makes sense to find the domain...