Tugas Persamaan Kuadrat
<html>
<head>
<title>Persamaan kuadrat</title>
</head>
<body>
<script language="JavaScript">
<!--
function determinant(a,b,c)
{
var d = (b*b)-(4*a*c);
return(d);
}
var a=parseFloat(prompt("Menghitung akar persamaan kuadrat masukan nilai A =\n"));
var b=parseFloat(prompt("Menghitung akar persamaan kuadrat masukan nilai B =\n"));
var c=parseFloat(prompt("Menghitung akat persamaan kuadrat masukan nilai C =\n"));
var det=determinant(a,b,c);
document.write("Nilai Determinannya = " +det+"<BR>");
document.write("<BR>");
document.write("<HR>");
if (det>0)
{
var x1 = (-b - Math.sqrt(det))/(2*a);
var x2 = (-b + Math.sqrt(det))/(2*a);
document.write("Nilai x1 = " +x1+ "<BR>");
document.write("Nilai x2 = " +x2+ "<BR>");
document.write("<BR>");
document.write("<HR>");
document.write("Akar-akarnya beda");
alert("Nilai akar-akarnya ada dan berbeda");
} else
if (det==0)
{
var x1 = (-b - Math.sqrt(det))/(2*a);
var x2 = (-b + Math.sqrt(det))/(2*a);
document.write("Nilai x1 = " +x1+ "<BR>");
document.write("Nilai x2 = " +x2+ "<BR>");
document.write("<BR>");
document.write("<HR>");
document.write("Akar-akarnya kembar");
alert("Nilai akar-akarnya sama");
} else
if (det<0)
{
document.write("Akar-akarnya tidak real");
alert("Nilai akar-akarnya tidak terdefinisi");
}
//-->
</script>
</body>
</html>
Tampilan
