Answer
$-120-35i$
Work Step by Step
Use the FOIL method to multiply the binomials.
$-5i(16-12i-12i+9i^2)$
Substitute $-1$ for $i^2$. Also, add/subtract like terms.
$-5i(16-24i+9(-1))$
Simplify.
$-5i(7-24i)$
Distribute through the parenthesis.
$-35i+120i^2$
Substitute $-1$ for $i^2$ And simplify.
$-120-35i$
