Factor completely 2x3 + x2 - 18x – 9.
(x2 - 9)(2x + 1)
(x - 3)(x + 3)(2x - 1)
(x - 3)(x + 3)(2x + 1)
(2x - 3)(2x + 3)(x - 1)

Question

Factor completely 2x3 + x2 - 18x – 9.  
 (x2 - 9)(2x + 1) 
  (x - 3)(x + 3)(2x - 1)
   (x - 3)(x + 3)(2x + 1)   
(2x - 3)(2x + 3)(x - 1)

anonymous · Answer

I really really need help with this one...will reward big medals!!!!!

anonymous · Answer

well this is not a hard question
first you can separate them into two parts (2x^3 + x^2)+(-18x - 9)
then you can simplify x^2(2x + 1)-9(2x + 1)
(x^2 - 9)(2x + 1) and you can go farther
(x^2 - 9) = (x + 3)(x - 3)
so the final answer would be (x+3)(x-3)(2x+1)

anonymous · Answer

Welcome to Openstudy!!!

anonymous · Answer

thank you so much for explaining how you got this answer....I actually want to have an idea of what I am doing and how I got the answer. Again, thank you so much for helping me with this question @friedrice