(11C) CUBIC EQUATION
06-09-2018, 07:50 PM (This post was last modified: 06-09-2018 08:25 PM by Dieter.)
Post: #7
 Dieter Senior Member Posts: 2,397 Joined: Dec 2013
RE: (11C) CUBIC EQUATION
Gamo, I see you updated your initial post, but there are still errors:

(06-09-2018 11:49 AM)Gamo Wrote:  LBL A // Input c Enter b Enter c then press A

Enter c, then b, then c once more ?!?

(06-09-2018 11:49 AM)Gamo Wrote:  RCL 3 // If D ˂ 0 then press LBL C for the answer of complex roots

If you press [LBL] [C] on an 11C (or another calculator) nothing will happen. ;-)
You have to press [GSB] [C] or [C].

(06-09-2018 11:49 AM)Gamo Wrote:  Example: X^3 - 6X^2 + 11X - 6 = 0

6 CHS ENTER
11 ENTER
6 CHS ENTER A display 0

The last ENTER is wrong, it has to be removed.
But OK, the input order here seems to be a ENTER b ENTER c.

(06-09-2018 11:49 AM)Gamo Wrote:  B Display 3 R/S 0.25 // D is greater than or equal zero go ahead with R/S

The returned 3 is the first root. But what is "0,25"?

(06-09-2018 11:49 AM)Gamo Wrote:  Example: X^3 - 4X^2 + 8X - 8 = 0

8 CHS ENTER
8 ENTER
4 CHS A Display 0

?!? Now the input order is c ENTER b ENTER a ?!?

So there are three variations in your post:

c ENTER b ENTER c
a ENTER b ENTER c
c ENTER b ENTER a

Gamooo.... ;-)

Dieter
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 Messages In This Thread (11C) CUBIC EQUATION - Gamo - 06-09-2018, 11:49 AM RE: (11C) CUBIC EQUATION - Gamo - 06-09-2018, 12:34 PM RE: (11C) CUBIC EQUATION - Dieter - 06-09-2018, 12:54 PM RE: (11C) CUBIC EQUATION - rprosperi - 06-09-2018, 01:00 PM RE: (11C) CUBIC EQUATION - Massimo Gnerucci - 06-09-2018, 01:18 PM RE: (11C) CUBIC EQUATION - Dieter - 06-09-2018, 06:05 PM RE: (11C) CUBIC EQUATION - Dieter - 06-09-2018 07:50 PM RE: (11C) CUBIC EQUATION - Valentin Albillo - 06-09-2018, 10:34 PM RE: (11C) CUBIC EQUATION - Dieter - 06-10-2018, 07:15 AM RE: (11C) CUBIC EQUATION - Valentin Albillo - 06-10-2018, 08:50 PM RE: (11C) CUBIC EQUATION - Dieter - 06-10-2018, 09:17 PM RE: (11C) CUBIC EQUATION - Albert Chan - 07-20-2021, 10:12 PM RE: (11C) CUBIC EQUATION - Gamo - 06-10-2018, 02:42 AM RE: (11C) CUBIC EQUATION - Gamo - 06-10-2018, 02:36 PM RE: (11C) CUBIC EQUATION - Dieter - 06-10-2018, 03:34 PM RE: (11C) CUBIC EQUATION - Dieter - 06-10-2018, 09:35 PM RE: (11C) CUBIC EQUATION - Gamo - 06-11-2018, 02:16 AM RE: (11C) CUBIC EQUATION - Dieter - 06-11-2018, 07:04 AM RE: (11C) CUBIC EQUATION - Gamo - 06-11-2018, 08:19 AM RE: (11C) CUBIC EQUATION - Dieter - 06-11-2018, 08:19 PM RE: (11C) CUBIC EQUATION - Gamo - 06-12-2018, 07:02 AM

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