(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.
(i)(4i)(-4i)
it is
4i^2(-4i) = -16i^3 ?
If it is not right, please help.
thanks!
1 answer