public void TestIsNotDetermined4()
        {
            double a = 0;
            double b = 0;
            bool   response_attesa = true;
            bool   response        = Equazioni.IsNotDetermined(a, b);

            Assert.AreEqual(response_attesa, response);
        }
        public void TestIsNotDetermined1()
        {
            double a = 5;
            double b = 6;
            bool   response_attesa = false;
            bool   response        = Equazioni.IsNotDetermined(a, b);

            Assert.AreEqual(response_attesa, response);
        }