Respostas

2014-03-05T15:18:03-03:00
 3^{-3} × 5^{2}  =   (\frac{1}{3}) ^{3} ×25 =  \frac{ 1^{3} }{ 3^{3} } ×25 =  \frac{1}{27} ×25 =  \frac{25}{27}