Posted by **Juri** on Saturday, August 4, 2007 at 11:38pm.

Factor out:

64x^3 + 1

It is a binomial times a trinomial

(4x+1)(16x^2-4x+1) should work. Check my math again!

[8x^(3/2) - i][8x^(3/2) + i]

Although my previous answer works (if i = sqrt-1), Taasha's is what you are looking for.