static void Main(string[] args)
{
var watch = System.Diagnostics.Stopwatch.StartNew();
NewtonMethod equation = new NewtonMethod();
// Func<double,double> f = x => Math.Pow(x,3)-x-0.231;
// //derivative
// Func<double,double> g = x => 3*Math.Pow(x,2)-1;
// Func<double,double> f = x => x-Math.Sin(x) - 0.25;
// Func<double, double> g = x=> 1-Math.Cos(x);
// Func<double,double> f = x => Math.Pow(Math.E,-x)-5*x-3;
// Func<double,double> g = x => Math.Pow(Math.E,-x)-5;
Func <double, double> f = x => Math.Pow(x, 2) - 612;
Func <double, double> g = x => 2 * x;
//double? root = equation.ExecuteNewtonRaphson(f,g,3,0.00001);
double?root = equation.ExecuteNewtonRaphson(f, g, 20, 0.05);
watch.Stop();
Console.WriteLine($"Root is {root}");
System.Console.WriteLine("\nTime to run: " + watch.Elapsed.TotalMilliseconds + " milisec");
}