Final answer:
The simplified form of 2√3 - 2√3 is 0, which is a rational number.
Step-by-step explanation:
In order to determine if the simplified form of 2√3 - 2√3 is rational, we first need to simplify the expression. Since we have the same terms being subtracted from each other, the expression will simplify to 0. Therefore, the simplified form is 0, and 0 is considered to be a rational number since it can be written as 0/1.