4 comments:

  1. ";
    echo "Coefficient of b is: ".$coff_b;
    echo "
    ";
    echo "Coefficient of c is: ".$coff_c;
    echo "
    ";
    $discriminant=$b*$b-4*$a*$c;

    if($discriminant>0)
    {
    echo "Roots are real and different";
    echo "
    ";
    $x1=(-coff_b+sqrt($discriminant))/2*coff_a;
    $x2=(-b-sqrt($discriminant))/2*a;
    echo " The roots of the quadratic equations are $x1 and $x2";
    echo "
    ";
    }

    elseif($discriminant==0)
    {
    echo "Roots are real and same";
    echo "
    ";
    $x1=(-b+sqrt($discriminant))/2*a;
    $x2=$x1;
    echo " The roots of the quadratic equations are $x1 and $x2";
    echo "
    ";
    }

    else
    {
    echo "Roots are imaginary and different";
    echo "
    ";
    $rp=-b/2*a;
    $img=sqrt(-$discriminant)/2*a;
    echo " The roots of the quadratic equations are x1=$rp+$img and x2=$rp-$img";
    echo "
    ";
    }


    ?>

    ReplyDelete
  2. $a=$_POST["num"];
    $b=$_POST["num2"];
    $c=$_POST["num3"];
    $determinant=pow($b,2)-4*$a*$c;
    $i=-1;
    if($determinant>=0)
    {
    echo ((-$b-sqrt($determinant))/(2*$a));
    echo "
    ";
    echo ((-$b+sqrt($determinant))/(2*$a));
    }
    else
    {echo "Non real roots
    ";
    echo ((-$b/(2*$a))-(sqrt($determinant*$i)/2*$a));
    echo "
    ";
    echo ((-$b/(2*$a))+(sqrt($determinant*$i)/2*$a));
    }

    ReplyDelete
  3. php
    $b=$_POST['n1'];
    $a=$_POST['n2'];
    $c=$_POST['n3'];
    $d=$b*$b-4*$a*$c;
    if($d>0)
    {$root1=(-$b+sqrt($d))/(2*$a);
    $root2=(-$b-sqrt($d))/(2*$a);
    echo "roots are $root1 and $root2 which are real";
    }
    else if($d==0)
    {$root1=-$b/(2*a);
    $root2= $b/(2*a);
    echo "roots are $root1 and $root2 which are real and equal";
    }
    else if($d<0)
    {echo "roots are imaginary";
    }

    ReplyDelete
  4. $a=$_POST["num"];
    $b=$_POST["num2"];
    $c=$_POST["num3"];
    $determinant=pow($b,2)-4*$a*$c;
    $i=-1;
    if($determinant>=0)
    {
    echo ((-$b-sqrt($determinant))/(2*$a));
    echo "
    ";
    echo ((-$b+sqrt($determinant))/(2*$a));
    }
    else
    {echo "Non real roots
    ";
    echo ((-$b/(2*$a))-(sqrt($determinant*$i)/2*$a));
    echo "
    ";
    echo ((-$b/(2*$a))+(sqrt($determinant*$i)/2*$a));
    }

    ReplyDelete