Hey there!
Don't worry there is no need to fear about this, I can explain how to factor this to you.
When your factoring take a look at the number on the far right end, in this case 12, it has factors to it correct (1, 2, 3, 4, 6, 12)? Then take a look at the term in the middle, in this case -9x.
But no factors of 12 would add up to 9.... so this means that this polynomial is in fact a....
Prime Polynomial (D)
I hope this helps!
Please vote me for Brainliest if there is a second answer! ^__^