Help with simplify in CAS
08-10-2022, 03:28 PM (This post was last modified: 08-10-2022 03:34 PM by dfsantos.)
Post: #1
 dfsantos Junior Member Posts: 14 Joined: Nov 2019
Help with simplify in CAS
I need help with some simplifications of the hp prime

and i want transform to

can someone tell me how to do it?
with simplify it doesn't work
08-10-2022, 03:55 PM
Post: #2
 dfsantos Junior Member Posts: 14 Joined: Nov 2019
RE: Help with simplify in CAS
One way I can think of to do it is with SYMB2POLY
08-11-2022, 05:50 PM
Post: #3
 rawi Member Posts: 171 Joined: Nov 2019
RE: Help with simplify in CAS
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)
08-11-2022, 06:04 PM
Post: #4
 Didier Lachieze Senior Member Posts: 1,631 Joined: Dec 2013
RE: Help with simplify in CAS
(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.
08-16-2022, 05:34 PM
Post: #5
 dfsantos Junior Member Posts: 14 Joined: Nov 2019
RE: Help with simplify in CAS
thanks!!!
Thats work!!!!
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