He is trying to find the square root of -1. There i no square to go to -1. This means that his girlfriend is not real. (I know it was a joke. I was just explaining it in case someone didn't know.0
If it is impossible to divide by 0, but any identical numerator and denominator in a fraction is considered equal to 1. Does this mean that zero divided by zero equals 1? Or would this become a paradox? Discuss.
Its like trying to slice cake into zero bits, thats why you cant do it, so dividing 0 by 0 is like cutting up 0 cakes into 0 cakes... It doesnt make sense!