Answer
$F$
Work Step by Step
Let's go ahead and multiply the coefficients together and the $i$ terms together:
$9i • 13i$ = $(9 • 13)(i • i)$
Multiply what is in the parentheses first:
$117i^2$
Replace $i^2$ with $-1$:
$117(-1)$
Multiply to solve:
$-117$
This answer corresponds to option $F$.
