//TODO try another method
private List <Complex> FourthPower(Equation eq)
{
List <Complex> solution = new List <Complex>();
double x1 = -100, x2 = 100, e = 0.001, c = 0;
int i = 0;
//for (int j = 0; j < 4; j++)
{
while (Math.Abs(c - x2) > e || i < 100)
{
c = (x1 + x2) / 2;
if (eq.FunctionValue(x1) * eq.FunctionValue(c) < 0)
{
x2 = c;
}
else if (eq.FunctionValue(c) * eq.FunctionValue(x2) < 0)
{
x1 = c;
}
else
{
solution.Add((x1 + x2) / 2);
break;
}
i++;
}
}
// solution=solution.Distinct() as List<Complex>;
return(solution);
}
public Complex DegreeEquation(Complex x)
{
Complex valueY = 0;
valueY = Variables.FunctionValue(x);
return(valueY);
}
public void Print(List <Complex> a, Equation eq)
{
dataGridView1.Rows.Clear();
for (int i = 0; i < a.Count; i++)
{
dataGridView1.Rows.Add();
dataGridView1[0, i].Value = $"x({i+1})={a[i]}";
dataGridView1[1, i].Value = $"f({a[i]})={eq.FunctionValue(a[i])}";
}
}