# Whats the absolute value of -9?

The absolute value of -9 (written $\left\mid - 9 \right\mid$) is $9$
The absolute value of a number is the (positive) magnitude of its distance from 0 (or from $\left(0 , 0\right)$ if dealing with the Complex plane).
$\textcolor{w h i t e}{\text{XXXX}}$$\left\{\begin{matrix}\left\mid x \right\mid = - x \mathmr{if} x < 0 \\ \left\mid x \right\mid = x \mathmr{if} x \ge 0\end{matrix}\right.$