# How do you multiply (-4i)^3?

Operate like real numbers, just remember that ${i}^{2} = - 1$
${\left(- 4 i\right)}^{3} = {\left(- 4\right)}^{3} \cdot {i}^{3} = - 64 \cdot {i}^{2} \cdot i = - 64 \cdot \left(- 1\right) \cdot i = 64 i$