static void Main(string[] args)
{
Polinomials p = new Polinomials(new double[] { 1, 0, 1, 0, -3, -3, 8, 2, -5 });
Polinomials p1 = new Polinomials(new double[] { 3, 0, 5, 0, -4, -9, 21 });
Console.WriteLine(p *= p1);
}
public static Polinomials operator -(Polinomials a, Polinomials b)
{
Polinomials newB = new Polinomials(b._numbers.Select(x => - x).ToArray());
return(a + newB);
}