Respuesta :

(8j3 - 5j2 - 5) - (6j3 - 12j2 + 8j - 7) = 
(8j3 - 6j3) - (5j2 - 12j2) - 8j - (5-7) =
2j3 - (-7j2) - 8j - (-2) =
2j3 + 7j2 - 8j + 2

The correct answer is D. 2j3 + 7j2 - 8j + 2