Need some help here.

Okay, math nerds.

I'm trying to solve this math problem. I'm trying to tutor someone, and this problem is really stumping me. Any help?

3x^2 – 2x + 7 = 0, then (x-1/3)^2 = ?

I need the answer in a fraction, and how you arrived at that answer.

It's been a couple of years. I'm rusty. Right now we're covering adding and subtracting fractions. I'm getting familiar with the difficult stuff now, so I can be prepared when we get to it.