I need help with a riddle my Algebra teacher gave us?

Why did the square root of 9 refuse to discuss anything with his brothers cubed root of 9, 1 ninth and the square root of negative 9?

2 answers

Brother cubed root of 9 is irrational.

Brother 1/9 repeats himself.

Brother square root of -9 is not real (he is imaginary).
ONE WAS IRRATIONAL
ONE KEPT ON REPEATING HIMSELF
ONE WAS UNREAL