using System;

public class Program

{

    public static void Main()

    {x1

            double a = double.Parse(textBox1.Text);

            double b = double.Parse(textBox2.Text);

            double c = double.Parse(textBox3.Text);

​

            double d = Math.Pow(b,2) + (4 * a * c);

​

            double x1=(-b+Math.Sqrt(d))/(2*a);

            textBox4.Text = x1.ToString();

​

     x2

            double a = double.Parse(textBox1.Text);

            double b = double.Parse(textBox2.Text);

            double c = double.Parse(textBox3.Text);

​

            double d = Math.Pow(b,2) + (4 * a * c);

​

​

            double x2 = (-b - Math.Sqrt(d)) / (2 * a);

            textBox5.Text = x2.ToString();

    }

}