Question

How do you divide `20 / (3+i)`?

Answer 1

`7.5-2.5i ->14/2-5/2i`

Explanation:

Given: `" "20/(3+i)`

Multiply by 1 but in the form of: `(3-i)/(3-i)`

`20/(3+i)xx(3-i)/(3-i)`

`(20(3-i))/(9-i^2)`

`(20(3-i))/8`

`7.5-2.5i ->14/2-5/2i`