title: Find poly1d Solutions for a Specified Complex Number
body: <p>Imagine I have a <code>np.poly1d</code> function: <code>5 x^2 + 2 x + 1</code>. How do I produce all complex solutions <code>5 x^2 + 2 x + 1 == a</code>, where <code>a</code> is another parameter input?</p>
  <p>The examples I've seen just play with altering the functions, themselves, or give outputs when inserting inputs for the variable in the <code>poly1d</code> function (i.e., the output of <code>5 a^2 + 2 a + 1</code>).</p>