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Quadratic Formula Input on Casio calculator

Hi guys;

Wanted to thank everyone for their commentary regarding modulus and absolute inequality values/equations; have been studying hard and feel a lot more confident about them than I did previously.

The focus of my studies has been on quadratic equations, but I am struggling with them the quadratic formula....though not because of the actual principles involved!

I have a Casio fx-991ES Plus (Silver) calculator, and I am a little bewildered as to the proper input for the quadratic formula.

I am aware that Mode, 5: EQN, Option 3 is the mode required for standard quadratic equations, but as I said; I am entirely sure as to what is the correct method and nuances of using the quadratic formula with this mode of calculator. I have read the manual, but if truth be told, I found myself becoming confused by the jargon terminology.