(i)(4i)(-4i)

it is

4i^2(-4i) = -16i^3 ?

If it is not right, please help.
thanks!

(4i)(-4i) --------> (4)(4) = 16 and i(-i) = -i^2

= -16i^2
= -16(-1) = 16

I have no clue what you were doing, or how you got that answer.

To simplify the expression (i)(4i)(-4i), you can follow the following steps:

Step 1: Simplify the multiplication of the imaginary units, i.
(i)(4i)(-4i) = (4i^2)(-4i)

Step 2: Simplify the term i^2.
Since i^2 is defined as -1, we can substitute it.
(4i^2)(-4i) = (4)(-1)(-4i)

Step 3: Simplify the expression.
(4)(-1)(-4i) = -16(-4i)

Step 4: Multiply the coefficients.
-16(-4i) = 64i

So, the expression (i)(4i)(-4i) simplifies to 64i.