\(-( \frac{-6}{7} )* (\frac{6}{7})\)
Remove parentheses : (a) = a
\(\frac{6}{7} * \frac{6}{7}\)
Apply exponent rule : \(a^b.a^c = a^{b+c}\)
\(\frac{6}{7} * \frac{6}{7} = ( \frac{6}{7}) ^{1+1} = (\frac{6}{7} )^{2}\)
Apply exponent rule:
\((\frac{a}{b})^c = \frac{a^c}{b^c}\)
\(\frac{6^2}{7^2} = \frac{36}{49}\)
hope this helps!.
