Generally, if the formula is written correctly, one or two points will be given.
But in conic curves, Vieta's theorem is needed. It doesn't matter what you write or not. Therefore, if you write Vieta Theorem in the topic, the general teacher will not give you a grade.
If you want to get the formula score of conic curve, you'd better write down all the equations of ellipse, parabola and hyperbola. Also, look at the standard problem solving process of the topic. Even if you can't, you know roughly what to write at each step. Write down the formulas and words you know. Never be completely blank!