$$log_a x = log_a (a^3b^2 \sqrt{c}) = log_a a^3 + log_a b^2 + log_a c^{\frac{1}{2}} = 3log_a a + 2log_a b + \frac{1}{2}log_a c = 3 \cdot 1 + 2 \cdot 3 + \frac{1}{2} \cdot (-2) = 3 + 6 -1 = 8$$.
Ответ: 8