just a simple should I retake question.

I got 750 on Math 2 in June. I’m planning on taking the physics subject test in December so I’m wondering if I should also retake the Math 2 test. I’m only taking the physics test because I need to, to apply to Carnegie Mellon and Cornell.
would a bump from a 750 to 800 be significant or should i concentrate on getting a good score on the physics.

Personally, I think that once you hit 750, you should call it a day and move on.