Question

simplify the expression: (-2i)(8i)

Answer 1

i = √-1
i x i = -1
(-2i)(8i) = -16 x - 1
= 16

Answer 2

multiply them
\[(-2)(8)i^2\]

Answer 3

\[\iota ^{2 }= -1 \]
\[(-2\iota)(8\iota)\]
-16(-1) since, \[\iota ^{2}=-1\]
16 is the answer of it

Answer 4

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