Question

Simplify the expression.
(-2i)(8i)

Answer 1

-16i^2

Answer 2

Remember
i = √-1
so
i^2 = -1
you can simplify further

Answer 3

It becomes positive 16.

Answer 4

can you please show me how you got that?

Answer 5

-1 x -16

Answer 6

(-2i)(8i)
is simply multiplication
-2 x 8 = -16
i x i = -1
this becomes
-16 x - 1 = 16

Answer 7

yes

Answer 8

8i * 2i
8 * 2 * i * i
16 * i^2
i^2 = -1.
16 * -1 = -16