function value = quartic ( x )

%*****************************************************************************80
%
%% quartic evaluates a quartic function.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    21 September 2019
%
%  Input:
%
%    real x, the argument.
%
%  Output:
%
%    real value, the function value.
%
  value = 2.0 * x.^4 - 7.0 * x.^2 + 3.0 * x + 11.0;

  return
end

