bantu jawab kakak.....

[tex](25 \sqrt{5} )^{ - \frac{ 2}{5} } = .... \\ \\ = ( {5}^{2}. {5}^{ \frac{1}{2} } ) ^{ - \frac{2}{5} } \\ \\ = ( {5}^{2 + \frac{1}{2} } )^{ - \frac{2}{5} } \\ \\ = ( {5}^{2 \frac{1}{2} } ) ^{ - \frac{2}{5} } \\ \\ = {5}^{ \frac{5}{2} \times ( - \frac{2}{5} )} \\ \\ = {5}^{ - 1} \\ \\ = \frac{1}{5} [/tex]

[tex] (25 \sqrt{5}) ^{-2/5} \\ = \frac{1}{(( 5^{2})( 5^{1/2})) ^{2/5} } \\ = \frac{1}{(5 ^{5/2}) ^{2/5} } \\ = \frac{1}{5} [/tex]