Question

What is the product of 5 - 3i and 4 - 5i?

Answer 1

The answer you are looking for is

5 - 37 i

Hope I helped!!

Answer 2

For this case we have the following complex numbers:
5 - 3i
4 - 5i
Multiplying both numbers we have:
(5 - 3i) * (4 - 5i)
(5 * 4) + (5 * (- 5i)) + ((-3i) * 4) + ((-3i) * (- 5i))
Rewriting we have:
20 - 25i - 12i + 15i ^ 2
20 - 37i + 15 (-1)
20 - 37i - 15
5 - 37i
Answer:
the product of 5 - 3i and 4 - 5i is:
5 - 37i