For standard parabola y² = 4ax, comparing with y² = 12x gives 4a = 12, so a = 3. So focus is at (3,0), directrix is x = -3, and latus rectum length is 4a = 12.
I remember this clearly from revising my son's tenth-class maths book, trying to keep my mind sharp—just like I track my patients' sugar levels, everything has a fixed formula.
But these days, with my granddaughter's weak eyes, I tell her, "Focus anta, but screen nundi dooram ga undu," directrix line laanti discipline ivvali.
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