Quadratic Equations are of the form ax2 + bx + c = 0. To find roots(root1 and root2) of such an equation, we need to use the formula:
Javascript code for calculating roots of quadratic equation is given below:
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| Roots of Quadratic Equation |
Javascript code for calculating roots of quadratic equation is given below:
<html><title>Root calculator</title><head>
<script type="text/javascript">
function roots()
{
var a = prompt("Enter value of a","");
var b = prompt("Enter value of b","");
var c = prompt("Enter value of c","");
var root_part = Math.sqrt(b * b - 4 * a * c);
var denom = 2 * a;
var root1 = ( -b + root_part ) / denom;
var root2 = ( -b - root_part ) / denom;
document.write("1st root: "+root1+"<br />");
document.write("2nd root: "+root2+"<br />");
}
</script>
</head><body>
<input type="button" onclick="roots()" value ="Root calculator" >
</body></html>
Demo for roots of Quadratic Equation using Javascript:
- click the Root calculator button
- simply enter the values of a, b & c
- calculated roots will be shown
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