# How do you perform the operation and write the result in standard form given -8i(9+4i)?

color(purple)(=> 32 - 72 i
$- 8 i \cdot \left(9 + 4 i\right)$
$\implies - 9 \cdot 8 i - 8 i \cdot 4 i$, removing the bracket.
$\implies - 72 i + 32$ as ${i}^{2} = - 1$