Ridiculously simple TI89 question

  • Context: Calculators 
  • Thread starter Thread starter tecrekka
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Discussion Overview

The discussion revolves around a user seeking assistance with a TI89 calculator issue related to displaying answers in algebraic notation. The problem involves unexpected numerical outputs when performing algebraic operations, specifically with the expression 3x^2(-5).

Discussion Character

  • Technical explanation

Main Points Raised

  • One participant expresses frustration over receiving incorrect outputs from the TI89 calculator and seeks help to display answers in algebraic notation.
  • Another participant suggests using the F6 Clear a-z function, indicating it may resolve the issue.
  • A later reply confirms that the suggested solution worked and inquires about how the variable might have been set to a default state when defined in an equation.
  • Another participant mentions that storing a value into the variable x (e.g., using 2 STO> x) is another method to address the issue.
  • The original poster expresses gratitude for the help and reflects on the simplicity of the solution.

Areas of Agreement / Disagreement

Participants generally agree on the effectiveness of the suggested solutions, but there is no consensus on the specifics of how the variable settings work within the calculator.

Contextual Notes

There are limitations regarding the understanding of variable definitions and settings in the TI89 calculator, which remain unresolved in the discussion.

tecrekka
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This is just driving me crazy, I know its a simple mode adjustment but I just can't find it. I am trying to display answers in algebraic notation but keep getting numbers that I can't even determine to base of.
Example: 3x^2(-5) yeilds -540 when I am looking for -15x^2.
If anyone could please help me with this exceedingly frustrating and exponentially benign question I would be grateful^10\inf.
 
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Try F6 Clear a-z.

I can be wrong, but I guess you have defined x variable.
 
YEAH! That did it! Thank you so much. Now, how did I do that in the first place? Does the variable get set to a default when you define it in an equation? Just curious. You just made my whole semester, thank you so much!
 
I don't remember details, many ways to skin that cat. For example it is enough to STOre something into x. Like
Code: 
2 STO> x
 
I see. Thanks again, I knew it had to be a simple solution but it eluded me for days.
 

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