Hi Guys, I need immediate help with this question however if anyone decides to respond with "I don't know" or answers with something inappropriate/irrelevant, I will report you and your points will be taken away.

The question is:
What is 12x³-4x²

Thanks again guys.
If anyone responds to me in a mannerly way and explained to me step by step how they got that answer, I will reward you with the Brainiest answer.