Question

How to create a nice piecewise function?

Answer 1

\[f(x) = |x+4| = \left\{\begin{array}{rcc}
x + 4 & \text{if} & x \geq -4 \\
- x - 4& \text{if} & x < -4
\end{array}
\right.
\]

Answer 2

\begin{array}{rcc}
what does rcc means?

Answer 3

r stands for row, c stand for colum. So you have 1 row and 2 columns