Bantu jawab soalnya besok dikumpulin

Bantu jawab soalnya besok dikumpulin

$( {5 {a}^{3} {b}^{ - 5} })^{ - 4} . {5}^{6} {a}^{8} {b}^{ - 12} \ = {5}^{ - 4} {a}^{ - 12} {b}^{20} . {5}^{6} {a}^{8} {b}^{ - 12} \ = {5}^{- 4 + 6} {a}^{ - 12 + 8} {b}^{20 + ( - 12)} \ = {5}^{2} {a}^{ - 4} {b}^{8} \ = 25 {a}^{ - 4} {b}^{8}$
jawaban C