POLYNOME DU SECONDS DEGRE

<div align="center"> 
  <table width="100%" border="0">
    <tr>
      <td bgcolor="#CC3333">
<div align="center"><strong><font color="#FFFFFF">Polynome du second degr&egrave;s</font></strong></div></td>
    </tr>
  </table>
  <p>&nbsp;</p>
  <p>Ax&sup2;+Bx+C</p>
  <p>&nbsp;</p>
  <form name="form1" method="post" action="">
    <p>A = 
      <input name="a" type="text" size="4">
      <br>
      B = 
      <input name="b" type="text" size="4">
      <br>
      C = 
      <input name="c" type="text" size="4">
    </p>
    <p>
      <input type="submit" value="Calculer">
    </p>
  </form>
  <? 
  $be = $b*$b;
  $ac = -4*$a*$c;
  $poly1 = $be+$ac;
  echo "B-4AC = $poly1";
  if ($poly1 < 0) {
  echo "<br>Il n'y a pas de racine pour les valeurs que vous avez rentré";
  }
  if ($poly1 > 0) {
  $bee = -$b;
  $rcd = sqrt($poly1);
  $aa = 2*$a;
  $bd = $bee-$rcd;
  $rac1 = $bd / $aa;
  echo "<br>Il y a 2 racines<br>1ere racine :
  (-B-(racine carré)D)/2A = $rac1";
   $bee = -$b;
  $rcd = sqrt($poly1);
  $aa = 2*$a;
  $bd = $bee+$rcd;
  $rac2 = $bd / $aa;
    echo "<br>2eme racine :
  (-B+(racine carré)D)/2A = $rac2";
  }
  if ($poly1 == 0) {
  echo "<br>Il y a une racine";
  $bee = -$b;
  $a2 = 2*$a;
  $rac3 = $bee / $a2;
  echo "<br>La racine est : $rac3";
  }
  ?>