Question

Help , stuck on this one .

Answer 1

D. -87 + 33i

Explanation:

(7 + 5i)(-6 + 9i)

7(-6 + 9i) + 5i(-6 + 9i)

-42 + 63i + -30i + 45i²

-42 + 33i + 45(-1)

-42 + 33i - 45

-87 + 33i

I hope this helps!