Question

How do you simplify `(-3i)(2i)`?

Answer 1

`(-3i)(2i)=6`

Explanation:

You have to compute the product as if it was a product of monomial
`(-3i)(2i)=-3*2*i*i=-6i^2`

Now `i` is the imaginary unit Complex Number Plane

and it's true the following identity:

`i^2=-1`

`:.-6i^2=-6*(-1)=6`