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\lhead{\textit{Analyse}}\lfoot{\textit{Premire STI}}
\rfoot{\emph{www.mathematic.fr}}

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\begin{center}{\huge{Equations du second degrŽ}}\end{center}
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Pour chaque niveau:

RŽsoudre les Žquations proposŽes, puis en proposer une du mme style ˆ un autre groupe.
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\section*{Niveau 1}

$$(2x+1)(x-3)=0$$
$$(3x+1)^2=0$$
$$-2(2x+3)^2=0$$

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Equation proposŽe: ............................................................

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\section*{Niveau 2}

$$x^2+2x+1=0$$
$$x^2-10x+25=0$$
$$4x^2+4x+1=0$$

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Equation proposŽe: ............................................................

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\section*{Niveau 3}

$$x^2-4x+5=0$$
$$4x^2-6x+3=0$$

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Equation proposŽe: ............................................................

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\section*{Niveau 4}

$$2x^2+8x+6=0$$
$$-5x^2+10x-2=0$$

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Equation proposŽe: ............................................................
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