## To Factor or to FOIL: Dividing by Zero on the GMAT

We all know not to divide by zero. It is a rule from middle school—if not earlier—and the reasons for it are pretty straightforward. If you look at the graph of y = 1/x, the y value approaches +âˆž as x approaches zero from the right, and the y value approaches —âˆž as x approaches zero from the left. But the graph never reaches x = 0, because you cannot divide by zero. Dividing 1… Read more