HP Forums
HP Prime: Isolate a variable in an equation - Printable Version

+- HP Forums (https://www.hpmuseum.org/forum)
+-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html)
+--- Forum: HP Prime (/forum-5.html)
+--- Thread: HP Prime: Isolate a variable in an equation (/thread-184.html)



HP Prime: Isolate a variable in an equation - Davidro - 12-20-2013 10:34 PM

Hello friends:

How to isolate a variable in an equation on HP Prime? Can anyone guide us? Searched the Guide and not found.
Thank You

David


RE: HP Prime: Isolate a variable in an equation - CR Haeger - 12-20-2013 10:58 PM

I'm not an expert but I tend to use the solve() command in CAS mode. For example

Solve(x+y=4,y) should return 4-x.

Good luck.


RE: HP Prime: Isolate a variable in an equation - Helge Gabert - 12-20-2013 11:00 PM

In CAS view, solve() should be of help.

E.g., solve(x^2-4*y*x=3,y) returns {(-x^2+3)/(4*x)}

Or solve(x^2-4*y*x=3,x) returns {2*y+-sqrt(4*y^2+3)}

Is that what you are after?


RE: HP Prime: Isolate a variable in an equation - Davidro - 12-21-2013 01:26 AM

(12-20-2013 10:58 PM)CR Haeger Wrote:  I'm not an expert but I tend to use the solve() command in CAS mode. For example

Solve(x+y=4,y) should return 4-x.

Good luck.

Thanks friends:
That's what I need. But, using this command with different variables X and Y, appears a recommendation that doesn't work either. Another observation is that the result is not symbolic when the variables are different from X and Y.
Grateful
David


RE: HP Prime: Isolate a variable in an equation - Helge Gabert - 12-21-2013 02:01 AM

You need to type in lower case variables.