Answer:
answer is the first one
Step-by-step explanation:
i dont know how to explain it
2400
I think it is correct. im not 100% sure on your question, but i treated the five's as variables and multiplied them with the number its touching.
the answer is down below the screenshot
20 + 0i
(10 + 5i) + (10 - 5i) = 20 + 0i
