title: Polynomial Root finding bisection
body: <p>If I am finding the roots of a polynomial using the bisection method, and in some cases depending on the polynomial the roots might be negative or they may be positive.</p>
  
  <p>I understand I can determine if the roots are going to be negative or positive, based on the result of evaluating the polynomial... however I am unsure what I would use as x.</p>
  
  <p>Can anyone give any insight here?</p>