Question about Texas Instruments TI-85 Calculator

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Saving what I typed

I have a question on how to save what I typed in the memory and then be able to retrieve it again later?



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Re: saving what I typed

Depends on what you are trying to save... you can save a variables(numbers) as a "stored value"(store and recall button [STO> and shift RCL>]).

You can bring back what you just typed in (without retyping it all) by hitting 2nd(or shift) enter.

Posted on Feb 07, 2008

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Memory store

You cannot save anything on this calculator. Once you change Mode or turn OFF calculator, everything saved evaporates.

Dec 04, 2013 | Casio FX991ES Scientific Calculator

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How to save equation in memory n use it back relative to ans

You cannot store permanently formulas. You can enter an equation to solve (In Equation mode). You can use the same equation again with different values but if you exit the EQAtion mode or turn off the calculator it will evaporate.

Nov 22, 2013 | Calculators

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Save equation fx 991es

In table Mode you can enter the formula for a function and generate a table of values. For a 991ES Plus you can enter two functions. However if you change MODE everything will be erased.
In EQN (equation) there is a certain number of built in formula types you can choose. You will be asked for the coefficients which will be used to solve the equation selected. However if you change MODE your lose what you entered. So basically you cannot save formulas to use as a memory aid (if that is what your intention is.) Sorry.

Jul 19, 2013 | Casio FX991ES Scientific Calculator

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Entering in missing data on saved program

Press PRGM. Select EDIT, then the program to be edited. Move to the line before which you want the new line inserted. Press 2nd [INS] ENTER to insert a blank line. Type in the missing line.
Exit the editor when done. The saving is done automatically.

Mar 06, 2012 | Texas Instruments TI-84 Plus Calculator

1 Answer

Calculating TVM variables I/Y & N. eg. N = 10, PV = 10,000, FV = 20,000, PMT = 0 but when I CPT I/Y I get Error 5

Error 5 indicates that no solution exists. In this particular case, you're asking for the interest rate on a savings account that pays you 10,000 now and an additional 20,000 10 years later. (Or a loan where you pay 10,000 now and an additional 20,000 10 years later.)

Either PV or FV should be negative. For example, if you deposit 10,000 in a savings account and withdraw 20,000 10 years later, use -10,000 for FV.

Aug 08, 2011 | Texas Instruments BA-II Plus Calculator

2 Answers

What does MC, MR, & MS mean?


Welcome to Fixya. Heres the meaning that you're looking for.

MC - Memory Clear. this clears all contents of the memory
MR - Memory Recall. This displays the current content in the memory
MS - Memory Save. This saves the current display to memory.
M+ - Memory Add. This adds the current figure to the value already present in memory.

Thanks for using Fixya.

May 12, 2011 | Calculators

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How do I enter (simple step-by-step please) the quadratic equation into this model of calculator?? Thanks.

The TI-30XA does not offer any symbolic algebra or equation solving functions. You will need to do some work on paper. However, its not super difficult.

Solving quadratic equations (finding the roots) involve three steps:
  1. Simplify the equation and bring into the normalized form x² + px + q = 0.
  2. Determine the discriminant D = p² - 4q and check if there are two, one or no solutions at all.
  3. Calculate the root(s), if any.
Lets do (1) with an example, 3x - 2 = ( 6 + x ) / x.

You should exercise this simplification with different examples until you can do it in your sleep. The goal is to get a form x² + px + q = 0, where in the above example case, p = -1 and q = -2.

Now, use the memory places #0 and #1 to store p and q, as in:

-1 [STO] 0
-2 [STO] 1

Next, you should determine the discriminant D = p² - 4q of the equation using your TI-30XA calculator. Having put the two values into the memory comes in handy here:

[RCL] 0 [x²] [-] 4 [x] [RCL] 1 [=] [STO] 2

Note, we put D into memory place #2, we will need it again later.

Now check the displayed value D:
  • if D
  • if D = 0, there is exactly one solution: -p / 2. Key in [RCL] 0 [+=-] [÷] 2 [=] and the displayed value is the only solution to the quadratic equation.
  • if D > 0, there are exactly two solutions:
    Key in [RCL] 0 [+=-] [+] [RCL] 2 [mib8888_40.gif] [=] [÷] 2 [=] to get the first root, and
    [RCL] 0 [+=-] [-] [RCL] 2 [mib8888_41.gif] [=] [÷] 2 [=] for the second root.
In the example, the discriminant turns out to be 9, which is greater than 0, so there are two different roots. Following the key sequences you should get the roots x1 = -1 and x2 = +2. You can double check by calculating
and you'll receive the original, normalized equation.

As an exercise for your understanding: you can save a few keystrokes by saving -p to memory #0 instead of p. Try to figure out why this helps.

Feb 11, 2011 | Texas Instruments TI-30XA Calculator

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How do you use memory on this model? is a personal Document Search Service for electronic user and service manuals. They help you to save time and money by finding your needed product information.

Feb 22, 2009 | Sharp EL-531VB Calculator

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I want to be able to write things in my calculator, such as formulas, and save them so that I can access them again later.


What you can do to save formulas on your calculator is while your calculator is on press the PRGM button scroll over to EDIT press ENTER then and start typing in the formulas you have (remember not to push CLEAR I learned the hard way and lost all my formulas, during my math final). While in the PRGM menu you can select NEW write a short name and press ENTER to have another area for typing (For example one area could be for Chemistry, one for Math, etc.) I hope that helps.

Jan 27, 2009 | Texas Instruments TI-83 Plus Silver...

1 Answer


There is no note program. You can hit [2nd] {STRNG} [F1] (type text with A-LOCK) [F1] [STO->] (type name with A-LOCK) [ENTER]
To view:
[2nd] {RCL} (type name with A-LOCK)
[2nd] {CATALOG] [ALPHA] <P> (hit down 5 times) [ENTER] (type name) [ENTER]

Turn off caps lock next time.

Oct 29, 2008 | Texas Instruments TI-85 Calculator

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