(self)
return 2*n*(n-1)
Returns the total number of roots for D_n"
Returns the total number of roots for D_n"
Returns the total number of roots for D_n
def roots(self):
        """
        Returns the total number of roots for D_n"
        """

        n = self.n
        return 2*n*(n-1)
def roots ( self ) : n = self . n return 2 * n * ( n - 1 )