Exact values of minimum, maximum etc. in Grapher app

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It's quite annoying when I use the Grapher app to find the minimum/maximum/zeros etc. and am given decimal approximations, as opposed to fractions, surds etc.

Shown above is the result of graphing y = 3x^2 - x, and then finding the minimum.

It would be great if, from Graph > Calculate > Find, I'd be able to see exact values when I click on one of Minimum, Maximum etc.

Otherwise, having the ability to calculate minima, maxima etc. in the Equations app, where exact values are already displayed would be great.

I'm fairly new to this calculator, so apologies if I've not spotted some functionality. I've taken a good look through the manual and can't find anything, however.