\[\frac{5\left( \sqrt{- a} \right)^{2} - 2\sqrt{4a^{2}}}{a} =\]
\[= \frac{5 \cdot ( - a) - 2 \cdot 2a}{a} =\]
\[= \frac{- 5a - 4a}{a} = - \frac{9a}{a} = - 9.\]