% !TeX TXS-program:compile = txs:///pdflatex

\documentclass[margin=5mm]{standalone}
\usepackage[nonpgfplots]{tkz-grapheur}

\begin{document}

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	\PlacerTexte[Police=\large,Position=right]{(1,1)}{$K$}
	\DefinirCourbe[Couleur=red,Trace,Fin=1]{x}
	\DefinirCourbe[Couleur=blue,Trace,Fin=1]{x^2}
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	\PlacerTexte[]{(0.775,0.175)}{ZONE 2}
	\draw (0.5,0.385) node[rotate=45] {ZONE 3} ;
\end{GraphiqueTikz}

\end{document}