using System;
public class DisplayFunction
{
public static void Main()
{
int y, x;
Console.WriteLine("y = x² - 2x +1");
Console.WriteLine();
for (x = -10; x <= 10; x++)
{
y = x * x - 2 * x + 1;
Console.WriteLine(
"x = {0} ; y=({0})² - 2*({0}) +1 = {1}",
x, y);
}
}
}