Question

rationalize the denominator. √2/3

Answer 1

Already done?

Answer 2

3 is a rational number.

Answer 3

3 is a rational number. HURRAH! =D

Answer 4

So the denominator does not need to be rationalized. Unless you really meant:
\[\sqrt{\frac{2}{3}}\]

Answer 5

Is that what you meant to write?

Answer 6

Assuming it is:
\[\sqrt{\frac{2}{3}}=\frac{\sqrt{2}}{\sqrt{3}}\times\frac{\sqrt{3}}{\sqrt{3}}=\frac{\sqrt{6}}{3}\]