# Partial Fraction Decomposition

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### #1 Flipper

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Posted 16 June 2004 - 04:43 PM

Greetings

I've bought a ClassPad 300 yesterday and I?m very pleased, above all, with its user interface. I also think that the hardware platform is superior to other vendor calcs. However, I would like to see some improvements to its CAS functions. One example I can remember is the lack of a direct way to do partial fraction decomposition, this transform is very useful when we need to calculate primitives of rational functions or calculate inverse Fourier/Laplace transforms, i.e.:

(x+3)/(x^2-7x+12) = -6/(x-3) + 7/(x-4)

TI-89 and Voyager do this with expand(). One away I found to do the same with ClassPad is to integrate (x+3)/(x^2-7x+12) and then differentiate the individual terms of the resulting sum. If we have complex roots it's not so simple.

Anyone has a better way? Maybe it's possible to write a Basic program to solve this.

Flipper

### #2 SoftCalc

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Posted 17 June 2004 - 04:51 PM

The ClassPad can do a partial fraction expansion using the "expand" command.

expand((x+3)/(x^2-7x+12) ,x) -> 7/(x-4) - 6/(x-3)

This feature might not have been in the original release. If this doesn't work on your version then get the latest OS update.

Flipper

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