not reducible to a rational expression ??

[WARP]

in algebraic mode
ROM 1.14
RAD xyz DEC C=

IN HP49
SOLVE(sqrt(x+2)+sqrt(x+3)=sqrt(5),x)
answer= not reducible to a rational expression
żhow solve this in HP calc.??

IN TI 89
answer= -6/5 <----- this is a correct answer
----------------------------------------------------------------------------
---------
Sorry for my bad english , but I speak Spanish

[ToddEStan]

I don't like the solve command because 1/2 the time it seems it don't
work. If you were in RPN mode (recommended), I would say type 30 MENU
then hit [LSHIFT] [F1] - and you'll get -1.2 which =-6/5. In algebraic
30 MENU works except when you hit [LSHIFT] [F1] the HP49 goes into the
y= screen. Booo!!! Hiss!!! The only thing I can suggest is to use the
Num.solv menu, then into solve equation. Then type in the equation and
hit enter, then select X and hit solve.

Todd

--

Spam filters in place. If you are accidently blocked, remove nospam.

[Jean-Yves Avenard]

Hello.

If the symbolic solver can't find a solution, then use the numeric solver
instead.
RightShift + 7 , then select Solve Equation

The HP49 will find -1.2 in around a second.

Jean-Yves

"WARP" <cmar...@directo.cl> wrote in message
news:5KO94.2190$1J1.22144@maule...

[Pete M. Wilson]

So, I put the equation on the stack (RPN mode).
Then I do Right Shift + 7 and pick Solve Equation.

Now I wanted to just solve the equation on the stack.

Is there a better way than EDIT, Del Line, Hist, Echo, Enter, Enter?

"Jean-Yves Avenard" <aven...@epita.fr> wrote:

>Hello.
>
>If the symbolic solver can't find a solution, then use the numeric solver
>instead.
>RightShift + 7 , then select Solve Equation
>
>The HP49 will find -1.2 in around a second.
>
>Jean-Yves
>
>"WARP" <cmar...@directo.cl> wrote in message
>news:5KO94.2190$1J1.22144@maule...
>> in algebraic mode
>> ROM 1.14
>> RAD xyz DEC C=
>>
>> IN HP49
>> SOLVE(sqrt(x+2)+sqrt(x+3)=sqrt(5),x)
>> answer= not reducible to a rational expression

>> ¿how solve this in HP calc.??

>>
>> IN TI 89
>> answer= -6/5 <----- this is a correct answer
>> --------------------------------------------------------------------------
>--
>> ---------
>> Sorry for my bad english , but I speak Spanish
>>
>>
>
>

Pete M. Wilson
Gamewood Data Systems Internet Service
wils...@gamewood.net

[Homer Simpson]

>If the symbolic solver can't find a solution, then use the numeric solver
>instead.

Solve should find the solution of this kind of equations imo. Should be
improved. The given is nothing more than a workaround, and I would like to
see how accurate the result would be if the exact solution was not rational
(does XQ recognize '1+sqrt(2)'? I don't think so).

>The HP49 will find -1.2 in around a second.

Wrong answer. The right answer is '-6/5' or equivalent, not a real.

"Introducing the HP49G Graphing Calculator...
... for those who want more than just the right answer."

Homer Simpson
http://zap.to/hsimpson

[Anthony P. Mohrenweiser]

OK,

Put the equation on the stack.
STEQ
<RS> 7 <Enter> <Down> <F6> <On>
Now you have to clean up the VAR dir.

You could use CleanSolver found on hpcalc.org (I am not associated w/ CleanSolver
other than as a satisfied customer). It leaves the EQ laying around, but gets
rid of the other stray bits. Then the process becomes:

Put the equation on the stack
CSLR
<LS> <F1> <F2>

Very neat...

Anthony P. Mohrenweiser

Pete M. Wilson wrote:

> So, I put the equation on the stack (RPN mode).
> Then I do Right Shift + 7 and pick Solve Equation.
>
> Now I wanted to just solve the equation on the stack.
>
> Is there a better way than EDIT, Del Line, Hist, Echo, Enter, Enter?
>
> "Jean-Yves Avenard" <aven...@epita.fr> wrote:
>
> >Hello.
> >

> >If the symbolic solver can't find a solution, then use the numeric solver
> >instead.

> >RightShift + 7 , then select Solve Equation
> >

> >The HP49 will find -1.2 in around a second.
> >

> >Jean-Yves
> >
> >"WARP" <cmar...@directo.cl> wrote in message
> >news:5KO94.2190$1J1.22144@maule...
> >> in algebraic mode
> >> ROM 1.14
> >> RAD xyz DEC C=
> >>
> >> IN HP49
> >> SOLVE(sqrt(x+2)+sqrt(x+3)=sqrt(5),x)
> >> answer= not reducible to a rational expression

> >> żhow solve this in HP calc.??

[Richard Helps]

Well you can save a couple of button presses

"Pete M. Wilson" wrote:

> So, I put the equation on the stack (RPN mode).
> Then I do Right Shift + 7 and pick Solve Equation.
>
> Now I wanted to just solve the equation on the stack.
>
> Is there a better way than EDIT, Del Line, Hist, Echo, Enter, Enter?

Skip the EDIT, Del Line. Start with the HIST

Richard Helps

[Pete M. Wilson]

Thanks!

But I forgot the Solve!

So, now it is put equation on stack, do RS+7, Enter, Hist, Echo,
Enter, Enter, Solve

Is it possible to right a program similar to INTVX to just invoke
solver on the equation on the stack?

Richard Helps <richar...@byu.edu> wrote: