/// <summary>
/// 解一元三次方式，盛金公式法
/// </summary>
/// <param name="_a">ax³</param>
/// <param name="_b">bx²</param>
/// <param name="_c">cx</param>
/// <param name="_d"></param>
/// <returns></returns>
public static Complex[] ThreeEquationShengjin(float _a, float _b = 0, float _c = 0, float _d = 0)
{
Shengjin _Shengjin = new Shengjin(_a, _b, _c, _d);
return(_Shengjin.calc());
}
/// <summary>
/// 解一元三次方式，盛金公式法
/// </summary>
/// <param name="_a">ax³</param>
/// <param name="_b">bx²</param>
/// <param name="_c">cx</param>
/// <param name="_d"></param>
/// <returns></returns>
public static Complex[] ThreeEquationShengjin(double _a, double _b = 0, double _c = 0, double _d = 0)
{
Shengjin _Shengjin = new Shengjin(_a, _b, _c, _d);
return(_Shengjin.calc());
}