Question

срочно!!!!!!!!!!!!!!!!!!!!!​

Answer 1

$\displaystyle\bf\\-\frac{9c^{2} }{5a} :\Big(\frac{3c}{10a^{2} }\Big) ^{3}=-\frac{9c^{2} }{5a}:\frac{27c^{3} }{1000a^{6} } } =-\frac{9c^{2} }{5a} \cdot\frac{1000a^{6} }{27c^{3} } =\\\\\\=-\frac{200a^{5}}{3c}$