Вопрос:

Ответ:

\[- \frac{5}{27}x^{3}yz^{2};\ \]

\[x = - 2;y = \frac{1}{25};z = - 9:\]

\[- \frac{5}{27} \cdot ( - 2)^{3} \cdot \frac{1}{25} \cdot ( - 9)^{2} =\]

\[= - \frac{1}{135} \cdot ( - 8) \cdot 81 = \frac{24}{5} = 4,8.\]