Respuesta :

The correct answer is option C

(4 - 6i)(6 - 8i)

= 4(6-8i) - 6i(6-8i)

= 24 - 32i - 36i + 48i²

= 24 - 68i + 48(-1)

= 24 -  68i - 48

= - 24 - 68i