Typeset/render dynamic content with MathJax

I used MathJax for displaying mathematics equations.It is working fine in statically written mathematics. But not working for dynamically added mathematics.

Here is my code

<body>
    //Static  
        <div>
            <span>\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)</span>                 
        </div> 
       //Dynamic 
        <div id="dynamic-pan">

        </div> 
        <script type="text/javascript" src="js/jquery.js"></script>
        <script type="text/javascript" src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_CHTML"></script>

        <script type="text/javascript">
            $(document).ready(function(){
                $('#dynamic-pan').empty();
                $('#dynamic-pan').append('<span>\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)</span>');
            });
        </script>
</body>

I have written mathematics in two span element. First one is statically declared and second one is dynamically added in document ready function

Please help me to resolve the issue.