Answer:
41
Step-by-step explanation:
(4 + 5i)(4 − 5i)
We know that (a-b) (a+b) = a^2 -b^2
4^2 - ( 5i)^2
16 -25i^2
We know that i^2 = -1
16 -25(-1)
16+25
edg 2020
