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<?php
$a = $_POST['a'];
$b = $_POST['b'];
$c = $_POST['c'];
$d = $b*$b - 4*$a*$c;
if($d < 0)
print "No Real Root (solution).";
else if ($d == 0){
$x = -$b/(2*$a);
print "The soluton is: $x<br>";
}
else{
$x1 = (-$b + sqrt($d))/(2.0 * $a);
$x2 = (-$b - sqrt($d))/(2.0 * $a);
print "The soluton1 is: $x1<br>";
print "The soluton2 is: $x2<br>";
}
//DEBUG
print "a = $a, b = $b, c = $c";
?>