Create a text file quadeq.py
. In it, define function get_roots(a, b, c)
which
accepts the coefficients $a$, $b$, and $c$ of a quadratic equation $ax^2 + bx + c = 0$, and
returns a list of its real roots, i.e., the function returns
a list with 2 numbers when the equation has 2 real roots,
a list with a single number when the equation has a single root only, or
an empty list when the equation has no real roots.
Assume that a
is always nonzero.