What is the domain of $f(x)=(x^2+2x)/(x^2-4)$ ?

Question

2020 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-02-15T02:06:25

The function $f(x) = (x^2 + 2x)/(x^2 - 4)$
is defined for all real values except those which cause
$x^2 - 4$ to be $= 0$

That is, the domain of $f(x)$
is the set of all real numbers excluding (+2) and (-2)
graph{(x^2 +2 )/(x^2 - 4) [-6.24, 6.25, -3.12, 3.12]}

What is the domain of f(x)=(x^2+2x)/(x^2-4)f(x)=(x^2+2x)/(x^2-4)?