based on the manual I cannot get expand and factor to work properly and get error messages. Please help, test tomorrow!

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- Mar 14th 2008, 06:24 AMchiph2@comcast.netTi-89 Titanium, expand and factor functions
based on the manual I cannot get expand and factor to work properly and get error messages. Please help, test tomorrow!

- Mar 14th 2008, 10:33 AMgalactus
Press F2, which is the algebra menu. Then 'factor'. Press in your expression and you should be set. Give me an example so I may have a better idea of what's going on. Tell me exactly what your are doing, thus resulting in the error message.

- Mar 14th 2008, 04:00 PMchiph2@comcast.netTi-89 expand/factor
I follow the examples in the manul for example on page 50 of the manual which I mimic precisely:

f2 3 ( x - 5 ) ^ 3 ) enter

the response I get back is non-algebraic variable in expression

Additionally:

On page 51 of the manual the factoring example results in the same response as above. Example: f2 2 x ^ 2 - 5 , x )enter.

Thanks for your help - Mar 14th 2008, 04:25 PMgalactus
I have a TI-92. They're almost identical in how they work. Here's a screen capture.

- Mar 14th 2008, 10:29 PMearboth
- Mar 15th 2008, 01:41 AMgalactus
I thought of that, but when a numerical value is entered into variable x, mine still returns the factored form of the number.

Let's say we wanted to factor $\displaystyle x^{2}+2x+1$

If, say, 3 were stored in x, I just get back 2^4 instead of $\displaystyle (x+1)^{2}$ - Mar 15th 2008, 04:21 AMmr fantastic
- Mar 15th 2008, 04:37 AMgalactus
Exactly. I hadn't thought of that. (Blush)

I clean mine regularly because some programs do not have local variables and do not delete them when the program is done running. - Mar 15th 2008, 04:48 AMmr fantastic
- Mar 17th 2008, 07:10 AMchiph2@comcast.netthanks
thanks a bunch guys! the f6 clear a-z was the deal! : )