Ok heres another factoring that I need someone to check
Problem: -x^3 + 27
-(x^3 - 3^3)
So I moved the positive and found out what cubed would make 27
Using the forumla: (a-b)(a^2+ab+b^2)
-(x-3) (x^2 + 3x + 9)
Right? Or did I make a mistake?