12.) $f(4) = \\frac{4^{2}+2(4)}{4 - 5}$ $f(4) = $

$12.) $f(4) = \\frac{4^{2}+2(4)}{4 - 5}$ $f(4) = $$

12.) $f(4) = \frac{4^{2}+2(4)}{4 - 5}$ $f(4) = $

First, calculate the numerator $4^{2}+2(4)$. $4^{2}=16$ and $2(4) = 8$, so $16 + 8=24$.

Next, calculate the denominator $4 - 5=-1$.

Now, divide the numerator by the denominator: $\frac{24}{-1}=-24$.

$-24$