Discussion
If 
, then x could be
| (A) | 1 |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 11/21/2012 10:55
I know it's hard, but after several steps you should get x^3 (x^3 -5) = 24. If you think carefully, the two factors with a difference of 5 that give a product of 24 are 8 and 3, so x^3=8, which means x=2 (D)
Posted: 11/21/2012 11:33
Federico, impeccable logic. x=2 is B, though.