Question 56480
8x^3 - 18x factor completely. 
Find the common factor: 2x
Factor it out of each of the terms:
=2x(4x^2-9)
4x^2-9 is the "difference of two squares
and it is factorable:
=2x(2x-3)(2x+3)
These factors cannot be further simplified.
Cheers,
Stan H.