Question

-3i(6-6i)

Answer 1

I am assuming that `i` is an imaginary number, and not just a variable (like in some algebra textbooks)

\(\normalsize\color{blue}{ -3i(6-6i) }\)
\(\normalsize\color{blue}{ (-3i) \times 6-(-3i) \times (6i) }\)
\(\normalsize\color{blue}{ -18i+(-18) }\)
\(\normalsize\color{blue}{ -18i-18 }\)

Answer 2

thank you @SolomonZelman