Question

determine os produtos .

Answer 1

$c) \\ (- \frac{8}{12} )\times(- \frac{3}{7} )=+ \frac{24}{84} ~~simplificar~~ \frac{24:12}{84:12} = \frac{2}{7} \\ \\ d) \\ (- \frac{2}{3} )\times(- \frac{2}{3} )\times(- \frac{2}{3} )\times(- \frac{2}{3} )=+ \frac{16}{81}$