# denote variable from CAS view to algebra view

lawrence shared this question 3 months ago

need to know how to denote postive root of solution of x^2-9=0 by a variable "a" in CAS view eg; denoting a=3 in CAS view and enabling it to operate in algebraic view

A equation is not a value. use RightSide(<equation>)

Select an element from a list with Element(<list>,<index>)

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This wiki page https://wiki.geogebra.org/e... can be useful to learn how to define math objects in CAS view, as well this tutorial https://www.geogebra.org/m/ogeMbIiF

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Thanks very much. I can compute 'a+5' in cas view but got error in algebra view. is is possible to compute 'a+5' in algebra view? thanks

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a in Algebra View is seen as a line, because Algebra View doesn't work in symbolic form.

So adding 5 to a line has no meaning, and it doesn't work.

x, y and z in Algebra View are reserved variables, related to the orthonormal reference system.

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instead of Element use Min or Max

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Thanks so much..

need to know how to use value of 'a" in attached file in CAS view as value of radius of circle in algebraic view. Thanks

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Can not see your problem, what about my former proposal, To dynamic worksheets use \$-reference and not #-reference.

If you want to use Solve your Line 3 should look like

```3: a:=Substitute(x,\$2)
> a:=sqrt(51) - 3```

I have a lot of CAS Worksheets dealing with vector geometrie https://www.geogebra.org/hawe

perhape this is interresting 4 you?

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Thanks so much! . your CAS worksheets are very interesting but all not in English. Is there a way the .ggb files saved in English. Thanks.

Actually need to construct a circle of radius 'a'=√51-3 (called from CAS) entered in algebraic view but got. error. any help will be appreciated.

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A equation is not a value. use RightSide(<equation>)

Select an element from a list with Element(<list>,<index>)

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Great work! Thank you very much.

How nice if is CAS is more mathematically-symbol -friendly for productivity sake.