Answer:
-40
20
20
20
Step-by-step explanation:
I believe the numbers are 63 and 65.
Answer: -1/2
Step-by-step explanation:
Given:

You know that:

In order to solve the operation, you can follow these steps:
1. Distribute the negative signs. Remember the Sign Rules for Multiplication:

Then:

2. Combine the like terms (add the Real Parts and add the Imaginary Parts):

Hence, the answer is: Option B.