title: Finding polynomial roots using Python -- Possible Numpy Extension Bug
body: <p>I am using Numpy to obtain the roots of polynomials. Numpy provides a module 'polynomial'.</p>
  
  <p>My hand calc for <code>x^2 + 5*x + 6 = 0</code> is <code>x = -2</code> &amp; <code>x = -3</code>. (Simple)</p>
  
  <p>But my code shows me the wrong answer: <code>array([-0.5       , -0.33333333])</code> (Inversed?)</p>
  
  <p>Could anyone please find the culprit in my code? Or is it simply a bug?</p>
  
  <pre><code>from numpy.polynomial import Polynomial as P
  p = P([1, 5, 6])
  p.roots()
  </code></pre>