Answer
$$\color{blue}{-30-40i}$$
Work Step by Step
$-5i(3-i)^2$
$-5i(9+(2)(-3i)+i^2)$
$-5i(9+-6i+(-1))$
$-5i(8+-6i)$
$-40i+30i^2$
$-40i+30(-1)$
$-40i-30$
in standard form $a+bi$: $\color{blue}{-30-40i}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.