HP 15C Quadratic Equation II « Next Oldest | Next Newest »

 ▼ jb Junior Member Posts: 7 Threads: 2 Joined: Jan 1970 01-18-2003, 02:36 PM Sirs, I have having a deuce of a problem getting the 15C Quadratic Equation II program to work (http://www.hpmuseum.org/software/15quad2.htm). I have tried reloading and rerunning it multiple times but must be doing something fundamentally wrong. For the equation: x^2 – 3x – 10 = 0, x should equal 5, -2. I put 1 on the stack and hit enter, -3 on the stack and hit enter, –10 on the stack and hit enter, then hit GSB 0, it gives an answer something like –1.67 and –3. What do you think I am doing wrong? Thank you. ▼ R Lion (Spain) Senior Member Posts: 294 Threads: 32 Joined: Jul 2005 01-18-2003, 02:52 PM If you press ENTER before the last number, then this is the stack: T: 1 Z: -3 Y: -10 X: -10 and this is not wich the prg needs, and it should give error 0 in this case. Symply do: 1 enter -3 enter -10 GSB 0 Raul ▼ jb Junior Member Posts: 7 Threads: 2 Joined: Jan 1970 01-18-2003, 03:11 PM Ho Ho! I knew it was something simple like that. Thank you for your quick response.

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