    \begin{EnonceCommunQCM}
      On considère la fonction $f$ du second degré définie par
      $f\left(x\right)=2x^2+2x-24$. On note $C_{f}$ sa courbe
      représentative dans le repère orthonormé $\left(O\ ;\ I,J\right)$.
    \end{EnonceCommunQCM}

 \begin{exercice*}
      Le tableau de variations de $f$ est :

      \begin{ChoixQCM}{2}
      \item \raisebox{-2cm}{
      \begin{tikzpicture}[scale=0.7,general]
        \tkzTabInit[lgt=2,espcl=1.6, lw=0.3mm, color, colorC=H4,
        colorV=H4, colorL=H4, colorT=A4]
        {$x$/1, $f$/2}
        {$-\infty$,$-1$,$+\infty$}
        \tkzTabVar{-/, +/$-\dfrac{49}{2}$ , -/}
      \end{tikzpicture}}
    \item \raisebox{-2cm}{
      \begin{tikzpicture}[scale=0.7,general]
        \tkzTabInit[lgt=2,espcl=1.6, lw=0.3mm, color, colorC=H4,
        colorV=H4, colorL=H4, colorT=A4]
        {$x$/1.25, $f$/2}
        {$-\infty$ , $-\dfrac{1}{2}$ , $+\infty$}
        \tkzTabVar{-/ , +/$-\dfrac{49}{2}$ , -/}
      \end{tikzpicture}}
    \item \raisebox{-2cm}{
      \begin{tikzpicture}[scale=0.7,general]
        \tkzTabInit[lgt=2,espcl=1.6, lw=0.3mm, color, colorC=H4,
        colorV=H4, colorL=H4, colorT=A4]
        {$x$/1.25, $f$/2}
        {$-\infty$,$-\dfrac{1}{2}$,$+\infty$}
        \tkzTabVar{+/ , -/$-\dfrac{49}{2}$ , +/}
      \end{tikzpicture}}
    \item \raisebox{-2cm}{
      \begin{tikzpicture}[scale=0.7,general]
        \tkzTabInit[lgt=2,espcl=1.6, lw=0.3mm, color, colorC=H4,
        colorV=H4, colorL=H4, colorT=A4]
        {$x$/1.25, $f$/2}
        {$-\infty$,$-\dfrac{1}{2}$,$+\infty$}
        \tkzTabVar{+/, -/$-\dfrac{1}{2}$/- , +/}
      \end{tikzpicture}}
      \end{ChoixQCM}
    \end{exercice*}
    \begin{corrige}
      \reponseQCM{c}
    \end{corrige}