<h2>DELTA X1 X2 FUNKCJAMI</H2>

<?php


$a=1;
$b=3;
$c=-4;
$d=($b*$b)-(4*$a*$c);

//=========================== DELTA ===================================

function delta($a, $b, $c)


{
	$delta = ($b*$b)-(4*$a*$c);

	return $delta;
}

  echo "delta = ".delta($a, $b, $c);

//=========================== X1 ======================================

function x1($a, $b, $delta)


{
	$x1=(-$b-sqrt($delta))/2/$a;

	return $x1;

}
echo "</br>";
echo "x1 = ".x1($a, $b, $d);

//============================ X2 ======================================

function x2($a, $b, $delta)


{
	$x2=(-$b+sqrt($delta))/2/$a;

	return $x2;

}

echo "</br>";
echo "x2 = ".x2($a, $b, $d);

//============================ X0 ======================================

function x0($a, $b)
	{
		$x0=(-$b) / (2*$a);
		return	$x0;
	}

echo "</br>";
echo "x0 = ".x0($a, $b,);



echo "</br>";
echo "</br>";
echo "</br>";
echo "</br>";
echo "</br>";

?>



<h2>DELTA X1 X2 PROŚCIZNA</H2>


<?php

$a = 1;
$b = 3;
$c = -4;



       $delta = ($b*$b)-(4*$a*$c);

		echo ("delta = $delta");
					echo "</br>";

	$x1=(-$b-sqrt($delta)) / (2*$a);
		echo ("x1 = $x1");

					echo "</br>";

	$x2=(-$b+sqrt($delta)) / (2*$a);
		echo ("x2 = $x2");

		echo "</br>";
		echo "</br>";
		echo "</br>";
		echo "</br>";

?>