using System;

public double delta (int a, int b, int c)

{

    double delta = (Math.Pow(b, 2)) - 4 * a * c;

    return delta;

}

​

double t = delta (21, 5, 1);

​

public double grau (double delta, int a, int b)

{

    double resposta1 = -b + (Math.Sqrt(delta)) / (2 * a);

    double resposta2 = -b - (Math.Sqrt(delta)) / (2 * a);

    return resposta2;

}

​

double e = grau (-59, 21, 5);

e

​

​