Question about Texas Instruments TI-89 Calculator

You are probably entering the equation wrong. Dont do this: 3600=x(2+2) You have to enter the equation 3600=x*(2+2)

Posted on Dec 30, 2009

Clear some memory space on ur graphing calc by going to var-link and deleting stuff that you do not use. Then solve again

Posted on Jul 09, 2008

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Posted on Jan 02, 2017

See image below

Oct 04, 2016 | Casio FX-9750GII Graphing Calculator

If you get **Memory** **Error **its meaninig that memory is insufficient to perform the instruction or function. You must delete items from memory

before executing the instruction or function.

Recursive problems return this error; for example,

graphing the equation Y1=Y1.

Branching out of an If/Then, For(, While, or Repeat

loop with a Goto also can return this error because

the End statement that terminates the loop is never

reached.

before executing the instruction or function.

Recursive problems return this error; for example,

graphing the equation Y1=Y1.

Branching out of an If/Then, For(, While, or Repeat

loop with a Goto also can return this error because

the End statement that terminates the loop is never

reached.

Jan 14, 2013 | Texas Instruments TI-84 Plus Calculator

Remove battery from calculator and put it again. Then type in HOME 2nd F1 and 2:NewProb and ENTER. Try to solve any equations now. It may be resolve problem!

Posted: Stevan Milanovic

Posted: Stevan Milanovic

Nov 25, 2011 | Texas Instruments TI-89 Calculator

There is nothing for directly solving cubics, but the general purpose Solver() function can be used for this. For example, given the cubic x^3+x^2=125 with a guess at a root at 4, Solver(x^3+x^2=125,x,4) will produce an answer of about 4.64. Full details are in the manual in the "Equation Solving" chapter.

Feb 22, 2011 | Texas Instruments TI-85 Calculator

"Is there anything that I can do about this to stop my answers being complex numbers when solving cubic equations?"

You are making an assumption that is unwarranted.Namely that a cubic equation must necessarily have 3 real roots. This is not the case.

Let your equation be

If coefficients are complex you should expect some complex roots. Right?

If the coefficients are REAL then depending on the discriminant

you can have three cases

DELTA positive : three distinct real roots

DELTA=0 , the equation has a multiple root and all roots are REAL

DELTA negative: the equation has ONE real root and 2 complex roots that are complex conjugate of each other.

It suffices to look at the Tartaglia/Cardano expressions of the roots to know that more often than not there is going to be complex roots.

You are making an assumption that is unwarranted.Namely that a cubic equation must necessarily have 3 real roots. This is not the case.

Let your equation be

If coefficients are complex you should expect some complex roots. Right?

If the coefficients are REAL then depending on the discriminant

you can have three cases

DELTA positive : three distinct real roots

DELTA=0 , the equation has a multiple root and all roots are REAL

DELTA negative: the equation has ONE real root and 2 complex roots that are complex conjugate of each other.

It suffices to look at the Tartaglia/Cardano expressions of the roots to know that more often than not there is going to be complex roots.

May 05, 2010 | Casio CFX-9850G Plus Calculator

Hello,

Simple is a relative complex. What do you mean by solving a function?. Usually you solve equation to find particular values of an unknown, and you draw function to see what it looks like over a range of values.

Take a simple function: y =x. If you draw it with a step of 10^(-6) you will run into memory problems.

I suggest you clear the memory of your calculator and, if you are running a program that misbehaves you should correct the programming errors.

Hope it helps.

Simple is a relative complex. What do you mean by solving a function?. Usually you solve equation to find particular values of an unknown, and you draw function to see what it looks like over a range of values.

Take a simple function: y =x. If you draw it with a step of 10^(-6) you will run into memory problems.

I suggest you clear the memory of your calculator and, if you are running a program that misbehaves you should correct the programming errors.

Hope it helps.

Dec 14, 2009 | Texas Instruments TI-89 Calculator

Hi,

First let us repair the terminology.

Hope it helps.

Thank you for using FixYa and for rating this solution.

First let us repair the terminology.

- You can evaluate any expression (find the value of any expression for a particular value of its variable).Store a value in the variable, say X. Key in the expression and press [EXE].
- You can consider your expression(should not contain a relational operator such as =, greater than, less than, greater than or equal to, less than or equal to) to be a function Y1(x) = expression and graph it, or generate a table for it. You will have several values of the function calculated at various points.
- You can set your expression equal to 0 and find the particular value(s) of the variable (the unknown) that make the equality TRUE. That is called solving an equation.

Hope it helps.

Thank you for using FixYa and for rating this solution.

Nov 05, 2009 | Casio FX-7400G Plus Calculator

Before you do any deleting, go back and make sure the structure on the input equation is correct. If what's given you the problem is archived, clearing RAM won't help. You have to unarchive it before you can delete it, if archived. Memory error could be that you out did a limit, and running to large of a program. [2nd] [VarLink] should take you to an area like my main folder is at (pictured below). First put a check mark next to what you want unarchived using the [F4] key. Then select [F1] manage key and the [9] key. Use the F1 manage key to unarchive, unlock, and delete.

Now to delete, I use the F4 key to check mark the folder then [F1] and [1] key to delete. Remember FixYa to help you with your Ti 89.

Now to delete, I use the F4 key to check mark the folder then [F1] and [1] key to delete. Remember FixYa to help you with your Ti 89.

Sep 14, 2009 | Texas Instruments TI-89 Calculator

I had this problem as well...Were you working on a SinReg equation by any chance? I was able to do every other type of regression (Linear, quadratic, cubic, ect..) In order to get Sinusoidal regression you need to make sure you arrow down to the Period box when entering the equation, and fill it in with the number of items in your table of values (a ten item list means a period of 10). That was the fix for me, so hopefully it works for you!

Jan 17, 2009 | Texas Instruments TI-89 Calculator

try a simple equation like x^2-1 which should come out with x = 1,-1

no sign change would indicate that the graph of the curve never crosses the x axis, if you graphed the above equation and calculated the zeros, it would come out with -1, 1 which it should, but if you put in x^2+1, the graph would never cross and therefore have no sign change from pos to neg or vice versa, the left-rt are the left and right bounds or the lower and upper bounds which was corrected in later calculators, Please let me know the outcome of graphing both of the above equations and then putting them in the solver. you could also use the quadratic equation to prove the answers if you liked, hope this helps

no sign change would indicate that the graph of the curve never crosses the x axis, if you graphed the above equation and calculated the zeros, it would come out with -1, 1 which it should, but if you put in x^2+1, the graph would never cross and therefore have no sign change from pos to neg or vice versa, the left-rt are the left and right bounds or the lower and upper bounds which was corrected in later calculators, Please let me know the outcome of graphing both of the above equations and then putting them in the solver. you could also use the quadratic equation to prove the answers if you liked, hope this helps

Mar 13, 2008 | Texas Instruments TI-83 Plus Calculator

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