(12C Platinum) Cubic Equation
02-04-2019, 08:13 PM
Post: #4
 Thomas Klemm Senior Member Posts: 1,881 Joined: Dec 2013
RE: (12C Platinum) Cubic Equation
Or then use the built-in polynomial solver with this program:
Code:
01-       1    1 02-      34    x<>y 03-      24    ∆% 04-45,43 31    RCL PSE 05-      34    x<>y 06-      33    R↓ 07-      25    % 08-      40    +

Examples:

$$x^3 - 4x^2 + 6x - 24 = 0$$

Enter coefficients:

1 CF0
-4 CFj
6 CFj
-24 CFj

Enter guess:

20 R/S
4.0000

$$-2x^3 + 3x^2 + 4x - 5 = 0$$

Enter coefficients:

-2 CF0
3 CFj
4 CFj
-5 CFj

Enter guess:

5 R/S
1.8508

Enter guess:

0.5 R/S
1.0000

The advantage is that the same program can be used for higher order polynomials.

Cheers
Thomas

PS: Cf. HP-12C’s Serendipitous Solver
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 Messages In This Thread (12C Platinum) Cubic Equation - Gamo - 01-12-2019, 09:27 AM RE: (12C Platinum) Cubic Equation - Albert Chan - 01-12-2019, 01:39 PM RE: (12C Platinum) Cubic Equation - Albert Chan - 02-04-2019, 04:10 PM RE: (12C Platinum) Cubic Equation - Thomas Klemm - 02-04-2019 08:13 PM RE: (12C Platinum) Cubic Equation - Albert Chan - 02-05-2019, 10:24 PM RE: (12C Platinum) Cubic Equation - Gamo - 02-05-2019, 04:24 AM RE: (12C Platinum) Cubic Equation - Thomas Klemm - 02-05-2019, 06:09 AM RE: (12C Platinum) Cubic Equation - Thomas Klemm - 02-05-2019, 06:20 AM

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