public static void ChuongTrinh_GiaiPhuongTrinhBacHai()
{
double a = HTConnsole.NhapSoThuc("a=");
double b = HTConnsole.NhapSoThuc("b=");
double c = HTConnsole.NhapSoThuc("c=");
if (a == 0)
{
Console.WriteLine("a khong the la 0");
return;
}
double[] nghiem = HTMath.PhuongTrinhBac2(a, b, c);
if (nghiem.Length == 2)
{
Console.WriteLine("Phuong trinh co 2 nghiem la x1 = {0}, x2 = {1}", nghiem[0], nghiem[1]);
}
else if (nghiem.Length == 1)
{
Console.WriteLine("Phuong trinh co 1 nghiem la x = {0}", nghiem[0]);
}
else if (nghiem.Length == 0)
{
Console.WriteLine("Phuong trinh vo nghiem");
}
}