Câu trả lời:

\(-\left|\frac{9^2.9^3}{3^{10}}\right|=-\left|\frac{9^5}{3^{10}}\right|=-\left|\frac{\left(3^2\right)^5}{3^{10}}\right|=-\left|\frac{3^{10}}{3^{10}}\right|=-\left|1\right|=-1\)