Question

What is the sum of the complex numbers −9−i−9−i and −5−i−5−i?

Answer 1

The sum of the complex numbers will be - 28 - 4i

Explanation:

We have the sum −9−i−9−i + −5−i−5−i. Let's group like elements and simplify this expression,

−9−i−9−i + −5−i−5−i ( Group like terms )

- i - i - i - i - 9 - 9 - 5 - 5 ( Add like terms )

- i - i - i - i = - 4i, - 9 - 9 = - 18, and - 5 - 5 = - 10

- 18 - 10 = - 28 ( Substitute )

Solution : - 28 - 4i