How to draw quadratic function using tkz-euclide?

Question

Is it possible to draw the following graph using tkz-euclide? The coordinate system looks better to me. I know how to get the coordinates, but not the quadratic function.

The code I have so far is only for the coordinate system:

\begin{tikzpicture}[scale = 0.5]
\tkzInit[xmax=5,ymax=5,xmin=-5,ymin=-5]
\tkzGrid
    \tkzLabelX[orig=true,label options={font=\tiny}]
    \tkzLabelY[orig=false,label options={font=\tiny}]
    \tkzDrawX
    \tkzDrawY
\end{tikzpicture}

Answer 1

With the tkz-fct package, use \tkzFct[<options>]{<function>}, compile with --shell-escape enabled, and I believe you need to have gnuplot installed.

\documentclass[border=5mm]{standalone}
\usepackage{tkz-fct}

\begin{document}
\begin{tikzpicture}[scale = 0.5]
\tkzInit[xmax=5,ymax=5,xmin=-5,ymin=-5]
\tkzGrid
    \tkzLabelX[orig=true,label options={font=\tiny}]
    \tkzLabelY[orig=false,label options={font=\tiny}]
    \tkzDrawX
    \tkzDrawY
    \tkzFct[domain=-5:0,black]{\x**2-4}
    \tkzFct[domain=0:5,black]{2*\x-4}
\end{tikzpicture}
\end{document}

If you'd like a method that doesn't involve gnuplot and shell-escape, you could try pgfplots:

\documentclass[border=5mm]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.14}
\begin{document}
\begin{tikzpicture}[scale = 0.5]
\begin{axis}[
  xmin=-5.5,xmax=5.5,
  ymin=-5.5,ymax=5.5,
  axis lines=center,
  xlabel=$x$,
  ylabel=$y$,
  grid,
  xtick={-5,...,5},
  ytick={-5,...,5},
  ticklabel style={font=\tiny,fill=white}]

\addplot [black,domain=-5:0] {x^2-4};
\addplot [black,domain=0:5] {2*x-4};
\end{axis}
\end{tikzpicture}
\end{document}

Answer 2

Thanks, @Torbjørn T. I think I just figured it out by using \draw

\documentclass[border=5mm]{standalone}
\usepackage{tkz-fct}
\usepackage{tkz-euclide}
\usepackage{graphicx}
\usepackage{tkz-fct}

\begin{document}
\begin{tikzpicture}[scale = 0.5]
\tkzInit[xmax=5,ymax=5,xmin=-5,ymin=-5]
\tkzGrid
    \tkzLabelX[orig=true,label options={font=\tiny}]
    \tkzLabelY[orig=false,label options={font=\tiny}]
    \tkzDrawX
    \tkzDrawY
    \draw[scale=1, domain=-3:0,smooth,variable=\x,blue, line width = 1pt] plot ({\x},{\x*\x-4});
    \draw[scale=1, domain=0:4.5, smooth, variable=\x, blue, line width = 1pt] plot({\x}, {2*\x-4});
\end{tikzpicture}
\end{document}