To shift the graph of the function \( f(x) = -2|x| \) down by 3 units, you can subtract 3 from the function \( f(x) \).
The equation of the new function \( g(x) \) can be written as:
\[ g(x) = f(x) - 3 \]
This gives us:
\[ g(x) = -2|x| - 3 \]
So the equation of \( g(x) \) is:
\[ g(x) = -2|x| - 3 \]
This function represents the graph of \( f(x) \) shifted down 3 units.