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Help with simplify in CAS - dfsantos - 08-10-2022 03:28 PM
I need help with some simplifications of the hp prime
![[Image: ecuacion.png]](https://i.postimg.cc/7LnTqtq1/ecuacion.png)
and i want transform to
![[Image: resultado.png]](https://i.postimg.cc/W3pqzm4B/resultado.png)
can someone tell me how to do it?
with simplify it doesn't work
RE: Help with simplify in CAS - dfsantos - 08-10-2022 03:55 PM
One way I can think of to do it is with SYMB2POLY
RE: Help with simplify in CAS - rawi - 08-11-2022 05:50 PM
dsfantos wrote:
Quote:with simplify it doesn't work
You are absolutely right: Simplify does not change anything.
If you apply epand to the expression you get:
4.2W^3 - 20.8*w^2+4.1*w+4.1+20.5*w-4.1 which is quite near to what you wanted.
Applying simplify to the result again does not change anything. Indeed this is very easy to simplify. A 5th grade pupil should see that +4.1 and -4.1 could be combined. A CAS-system should be able to do it.
Applying collect delivers a somewhat other result I am not sure whether this is correct:
4.2*w*(w-3.)*(w-1.952381)
RE: Help with simplify in CAS - Didier Lachieze - 08-11-2022 06:04 PM
(08-11-2022 05:50 PM)rawi Wrote: dsfantos wrote:Quote:with simplify it doesn't work
You are absolutely right: Simplify does not change anything.
If you apply epand to the expression you get:
4.2W^3 - 20.8*w^2+4.1*w+4.1+20.5*w-4.1 which is quite near to what you wanted.
Apply expand twice to get the first expected result.
RE: Help with simplify in CAS - dfsantos - 08-16-2022 05:34 PM
thanks!!!
Thats work!!!!