Question 3490
 f(x) = 2x^3-3x^2-18x-8
      = 2x^3 + x^2 -4x^2-18x-8 
      = x^2(2x+1) -2(2x^2 + 9x+4)
      = x^2(2x+1) -2(2x+1)(x+4)
      = (2x+1)(x^2-2x-8)
      = (2x+1)(x-4)(x+2)
 
 Or use syntheic  division

 2 -3 -18 -8 (-2
   -4 +14 +8
-------------
 2 -7 -4  +0 (4
   +8 +4
---------
 2 +1 +0


 Kenny