Calculators Ti 89 Graphing Help: Fixing "Not an Algebraic Expression" Error

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SUMMARY

The forum discussion addresses the "Not an Algebraic Expression" error encountered on the TI-89 graphing calculator when inputting the expression -1x/(x-1). Users suggest that the issue may stem from variable conflicts and recommend clearing variables or using alternative variable names such as y, z, t, or xy. The TI-84 calculator successfully processes the same expression, indicating a difference in handling algebraic expressions between the two models.

PREREQUISITES
  • Understanding of algebraic expressions and their syntax
  • Familiarity with TI-89 graphing calculator functions
  • Basic knowledge of variable manipulation in graphing calculators
  • Experience with TI-84 calculator operations
NEXT STEPS
  • Research how to clear variables on the TI-89 calculator
  • Explore alternative variable naming conventions in TI calculators
  • Learn about the differences in expression handling between TI-89 and TI-84
  • Investigate common errors and troubleshooting techniques for TI-89 calculators
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Students, educators, and anyone using TI-89 graphing calculators who need assistance with algebraic expressions and troubleshooting common errors.

whitneysit
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So I have a project due tomorrow and I really need to use a caculator and Mine won't work right.

When insert
-1x/(x<o)/(x>-1)

It saids its not an algebraic expression how do I fix that.
I try it with an ti 84 and it worked.
 
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Have you tried clearing your variables? Maybe try something other that x, such as y, z, t, or even xy (which is not the same as x*y).
 

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