Expansion not working
04-01-2019, 06:22 PM
Post: #1
 borao Junior Member Posts: 1 Joined: Apr 2019
Expansion not working
Hello. I am trying to use expand(rref(<some augmented matrix for LRC circuit>)) and the result is rational with polynomials in the numerator and denominator. When I copy the result and paste, then factor, the polynomial is factored but the partial fraction expansion returns an ugly fourth degree polynomial for something that should be second degree. Is there something I'm missing, or another command. My professor uses the TI Nspire and he said expand(rref should work. Is there an analogue to TI's expand for Prime?
04-02-2019, 02:36 AM
Post: #2
 Tim Wessman Senior Member Posts: 2,293 Joined: Dec 2013
RE: Expansion not working
Please provide a complete example showing what you want to enter and what to expect as a result else people probably won't be able to help much.

TW

Although I work for HP, the views and opinions I post here are my own.
04-02-2019, 05:33 AM
Post: #3
 parisse Senior Member Posts: 1,318 Joined: Dec 2013
RE: Expansion not working
Try partfrac
04-02-2019, 11:42 AM
Post: #4
 Aries Member Posts: 159 Joined: Oct 2014
RE: Expansion not working
(04-01-2019 06:22 PM)borao Wrote:  Hello. I am trying to use expand(rref(<some augmented matrix for LRC circuit>)) and the result is rational with polynomials in the numerator and denominator. When I copy the result and paste, then factor, the polynomial is factored but the partial fraction expansion returns an ugly fourth degree polynomial for something that should be second degree. Is there something I'm missing, or another command. My professor uses the TI Nspire and he said expand(rref should work. Is there an analogue to TI's expand for Prime?

Could you please share an example of the expression ?
So long,

Aries
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