Casio fx-85GT PLUS calculator. How do I access & then use the quadratic equation formula?

Have looked in the user guide - cannot find information on use of the quadratic formula.

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Just use the square root button...? –  Hans Lundmark Nov 14 '11 at 11:49

Most likely, the Casio fx-85GT PLUS (as with virtually all scientific calculators) doesn't do anything special for the quadratic formula. If you know the quadratic formula, you can substitute the values of the coefficients of your quadratic and then enter the resulting expressions into your calculator.

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(2) It can find the prime factors of integers up to $10^{10}$.