Respuesta :

27nalhalawi

Answer:

129+57i

Step-by-step explanation:

ghaithgh

[tex]( - 6 - 9i)( - 11 + 7i) \\ = 66 - 42i + 99i - 63 {i}^{2} \\ = 66 + 57i + 63 \\ = 129 + 57i[/tex]

I hope I helped you^_^