Let function $f(x)$ be defined by the equation:

$$ f(x) = 3x^2 - 12x + 5 $$

Now, consider the function $g(x)$ which is defined as follows:

$$ g(x) = f(x) + 2f(x - 1) $$

Calculate the value of $g(2)$ and provide your answer as a decimal rounded to two decimal places.