My teacher tells it can't be but I don't know.....

Another way to see why this is true: try dividing by a very small number. For example: 2/0.001 = 2000. Now make that denominator even smaller: 2/0.0001 = 20,000. And smaller: 2/0.0000001 = 20,000,000.

As you can probably tell by now, as the denominator gets smaller and shrinks towards zero, the quotient (the answer) grows larger, towards infinity. So technically speaking, you can say that dividing anything by zero = infinity, and that's "undefined" (can't put a number on it) in math.

## Comments

This question has been thoroughly discussed in a previous WyzAnt Answers question:

http://www.wyzant.com/answers/1341/why_cant_you_divide_by_zero_wont_it_just_be_zero