-12x^6 - 60x^5-75x^4.......GCF = 3x^4
3x^4(-4x^2 - 20x - 25)
3x^4(-2x - 5)(2x + 5) <==
The second one is the best answer in my opinion i'm not sure.
I have no idea what the answer to that is or how to solve it but i LOVE UR PROFILE PICTURE
3*3*5 is equal to 45 AND its factors are prime.
:)