Question

How do you evaluate `2i ( - 6+ 3i )`?

Answer 1

`-6-12i`

Explanation:

By multiplication
`2i(-6+3i)=-12i+6i^2`
where `i^2=-1`
Therefore
`-12i+6i^2=-12i-6`
It can be written as
`-6-12i`