Factor the common factor out of -12^3 - 12x - 9

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Ineed i been stuck on this question since yesterday