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(11C) Quadratic Equation
08-11-2018, 04:39 PM (This post was last modified: 09-06-2018 11:49 AM by Albert Chan.)
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RE: (11C) Quadratic Equation
(03-22-2018 10:18 AM)Dieter Wrote:  One of my first books on RPN and HP calculators also had a program for quadratic equations.
To distinguish real and complex solutions it displayed "1111111111" for the latter case.
In the calculator display this looks like a line of "i"s that indicate a solution with an imaginary part. ;-)

I did a Quadratic Solver for Casio FX-3650P:

Instead of using a special number for signaling complex roots.
I CRASH the program, on purpose, by taking square root of negative discriminant.
(complex roots = X +/- Y * I, stored in memory X, Y)

If user is still not warned about roots being complex, I don't know what will :-)

I had revised the solver, allowed for adjustable discriminant (if more precise available).
Since discriminant is shown, it's sign signaled real or complex roots.
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Messages In This Thread
(11C) Quadratic Equation - Gamo - 03-21-2018, 06:50 AM
RE: (11C) Quadratic Equation - Dieter - 03-22-2018, 10:18 AM
RE: (11C) Quadratic Equation - Albert Chan - 08-11-2018 04:39 PM

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