Question

How do you combine like terms of `(9+ 3i ) - ( - 4- i )`?

Answer 1

`13+4i`

Explanation:

`(9+3i)-(-4-i)`

Distribute the negative
`(9+3i)+(4+i)`

Add constants
`13+3i+i`

Combine `i`s
`13+4i`