function fx = p20_fx ( n, x )

%*****************************************************************************80
%
%% P20_FX evaluates the function for problem 20.
%
%  Discussion:
%
%    This problem has a single root at the origin, and a multiple root
%    at x = 5.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    10 October 2020
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    integer N, the number of variables and equations.
%
%    real X(N), the evaluation point.
%
%  Output:
%
%    real FX(N), the function value.
%
  fx = zeros ( n, 1 );

  fx(1) = x(1) * ( x(1) - 5.0 ) * ( x(1) - 5.0 );

  return
end

