(42S) Short Quadratic Solver
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05-29-2014, 04:23 AM
(This post was last modified: 05-29-2014 03:53 PM by Gerson W. Barbosa.)
Post: #8
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RE: Short Quadratic Solver (HP-42S)
(05-28-2014 10:17 PM)Jeff_Kearns Wrote:(05-28-2014 04:18 AM)Gerson W. Barbosa Wrote: If the roots are complex, the flag 1 annunciator will be lit and the real and complex parts will be in registers Y and X, respectively. Jeff, I hope this is better, although not so short anymore: Code:
Usage examples on the HP-32SII 1 ENTER 5 +/- ENTER 6 XEQ Q --> 2 x<>y --> 3 (Two real roots, because the flag 1 annunciator is off) 1 ENTER 1 +/- ENTER 1 XEQ Q --> 0.5 x<>y 8.66025404E-1 R↓ 0.5 x<>y -0.86602540378 (Two complex roots, 0.5 ± (√3)÷2 i, because the flag 1 annunciator is on) Alternatively, you can use a slightly modified version of Eddie Shore's program to save a few steps: Code:
Regards, Gerson. P.S.: Regarding issue #1, that happens because the first RTN instruction (step Q21), not the last, is executed when flag 1 is set. |
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Messages In This Thread |
(42S) Short Quadratic Solver - Gerson W. Barbosa - 04-24-2014, 12:32 AM
RE: Short Quadratic Solver (HP-42S) - Jeff_Kearns - 05-25-2014, 03:30 PM
RE: Short Quadratic Solver (HP-42S) - Gerson W. Barbosa - 05-25-2014, 09:55 PM
RE: Short Quadratic Solver (HP-42S) --- and 32Sii?? - Jeff_Kearns - 05-27-2014, 05:30 PM
RE: Short Quadratic Solver (HP-42S) - Thomas Klemm - 05-27-2014, 06:57 PM
RE: Short Quadratic Solver (HP-42S) - Gerson W. Barbosa - 05-28-2014, 04:18 AM
RE: Short Quadratic Solver (HP-42S) - Jeff_Kearns - 05-28-2014, 10:17 PM
RE: Short Quadratic Solver (HP-42S) - Gerson W. Barbosa - 05-29-2014 04:23 AM
RE: Short Quadratic Solver (HP-42S) - Thomas Klemm - 05-29-2014, 05:10 AM
RE: Short Quadratic Solver (HP-42S) - Gerson W. Barbosa - 05-29-2014, 03:48 PM
RE: Short Quadratic Solver (HP-42S) - Jeff_Kearns - 05-30-2014, 03:56 AM
RE: Short Quadratic Solver (HP-42S) - Gerson W. Barbosa - 05-31-2014, 03:31 AM
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