(-5/6)⁶.(6/5)⁸ = (-5/6)⁶.(6/5)⁶.(6/5)²
= (-5/6 . 6/5)⁶ . 36/15
= 1 . 36/25
= 36/25
\(\left(\dfrac{-5}{6}\right)^6.\left(\dfrac{6}{5}\right)^8\)
<=>\(\left(\dfrac{6}{5}\right)^{-6}.\left(\dfrac{6}{5}\right)^8\)
<=>\(\left(\dfrac{6}{5}\right)^2\)
<=>\(\dfrac{36}{25}\)