Untuk yang master Al Jabar, mohon penjelasanya

[tex] {( - \frac{8}{27}) }^{ \frac{ - 2}{3} } = {( - \frac{27}{8}) }^{ \frac{2}{3} } = {( - \frac{ {3}^{3} }{ {2}^{3} } })^{ \frac{2}{3} } =[/tex]
[tex]( - \frac{ {3}^{3. \frac{2}{3} } }{ {2}^{3. \frac{2}{3} } } ) = ( - \frac{ {3}^{2} }{ {2}^{2} } ) = - \frac{9}{4} [/tex]