Question

Simplify the expression. [(–5)–7 (–5)8]3

Answer 1

$\bf [(-5)^{-7}(-5)^8]^3\implies \left[(-5)^{-7+8} \right]^3\implies \left[ (-5)^1 \right]^3 \\\\\\ (-5)^{1\cdot 3}\implies (-5)^3\implies (-5)(-5)(-5)\implies -125$