# What is (-∞, -3) U (-3, ∞) in inequality notation?

Jul 24, 2018

$x < - 3$ AND $x > - 3$
or
$- 3 < x < - 3$

#### Explanation:

Since we know that parentheses (soft brackets) next to a number means that it is NOT including that number, we know that $- 3$ is not a solution.

It can be anything less than or greater than $- 3$, but not $- 3$, so the inequality can be written as:
$x < - 3$ AND $x > - 3$
or
$- 3 < x < - 3$

Hope this helps!