Answer
$-52+72i$
Work Step by Step
We multiply each term of the first complex number with the second complex number and then simplify:
$(-3-7i)(-6-10i)$
=$-3(-6-10i)-7i(-6-10i)$
=$18+30i+42i+70i^{2}$
=$18+72i+70(-1)$ [We substitute -1 in place of $i^{2}$ as $i^{2}=-1$]
=$18-70+72i$
=$-52+72i$
