Question

How do you multiply `(2i) * (4i)`?

Answer 1

`-8`

Explanation:

=`(2i)(4i)`

=`8i^2`

Where `i^2=-1`

=`8(-1)`

=`-8`

Hope it helps!

Answer 2

`-8`

Explanation:

`•color(white)(x)i^2=(sqrt(-1))^2=-1`

`rArr2ixx4i=8i^2=8xx-1=-8`