50g

Back in the old days(early 90's) at San Diego State University I used
an HP27S to get awesome grades in all of my statistics and business
classes. I and a few of my study buddies would enter all kinds of
equations within equations with tons of variables before every test.
The instructors actually encouraged us to do this. One time, while I
was doing an intership at the IRS, I even created an equation that
would figure out your taxes (1040 with deductions and more!). All of
these equations were lost many years ago because I would always
forget to replace the batteries.

Anyway, the solver on the 27s was fairly simple to use compared to
what is on the HP50g. I love the way a 50g can create graphs and the
feel of the buttons. I've learned to use the equation writer and it
is great at displaying equations in textbook style! But, I've yet to
figure out how to write a simple equation and retrieve it for later
use. For example, I'd like to enter the quadratic equation and be
able to use it from time to time. Any pointers would be greatly
appreciated. I do have a copy of the User's Manual and User's Guide
in .pdf form.

Quadratic Equation (one each for +/-):

1.
x=(-b+Sqrt(b^2-4ac))/2a

2.
x=(-b-Sqrt(b^2-4ac))/2a

Thanks in Advance

There are different ways to do your quadratic problem. A quick & dirty way is to use the DEF command.

enter 'PLUS(A,B,C)=(-B+(B^2-4*A*C)^.5)/2*A'
press the DEF key on your keyboard
You'll see PLUS as one of your menu keys.
enter e.g. 1 -2 -3 on the stack and press that PLUS soft key and the function will be evaluated.

You can do the same with the negative part...
'MINUS(A,B,C)=(-B-(B^2-4*A*C)^.5)/2*A'

--- On Wed, 7/16/08, Jose J Martinez <jose_j_martinez@...> wrote:

> From: Jose J Martinez <jose_j_martinez@...>
> Subject: [50g] HP 27S Solver & HP 50g Solver
> To: 50g@yahoogroups.com
> Date: Wednesday, July 16, 2008, 11:45 PM
> Back in the old days(early 90's) at San Diego State
> University I used
> an HP27S to get awesome grades in all of my statistics and
> business
> classes. I and a few of my study buddies would enter all
> kinds of
> equations within equations with tons of variables before
> every test.
> The instructors actually encouraged us to do this. One
> time, while I
> was doing an intership at the IRS, I even created an
> equation that
> would figure out your taxes (1040 with deductions and
> more!). All of
> these equations were lost many years ago because I would
> always
> forget to replace the batteries.
>
> Anyway, the solver on the 27s was fairly simple to use
> compared to
> what is on the HP50g. I love the way a 50g can create
> graphs and the
> feel of the buttons. I've learned to use the equation
> writer and it
> is great at displaying equations in textbook style! But,
> I've yet to
> figure out how to write a simple equation and retrieve it
> for later
> use. For example, I'd like to enter the quadratic
> equation and be
> able to use it from time to time. Any pointers would be
> greatly
> appreciated. I do have a copy of the User's Manual and
> User's Guide
> in .pdf form.
>
> Quadratic Equation (one each for +/-):
>
> 1.
> x=(-b+Sqrt(b^2-4ac))/2a
>
> 2.
> x=(-b-Sqrt(b^2-4ac))/2a
>
> Thanks in Advance

Oops, that should be...
PLUS(A,B,C)=(-B+(B^2-4*A*C)^.5)/(2*A)
and
MINUS(A,B,C)=(-B-(B^2-4*A*C)^.5)/(2*A)

--- On Thu, 7/17/08, Don Hart <ddhart1@...> wrote:

> From: Don Hart <ddhart1@...>
> Subject: Re: [50g] HP 27S Solver & HP 50g Solver
> To: 50g@yahoogroups.com
> Date: Thursday, July 17, 2008, 9:50 PM
> There are different ways to do your quadratic problem. A
> quick & dirty way is to use the DEF command.
>
> enter 'PLUS(A,B,C)=(-B+(B^2-4*A*C)^.5)/2*A'
> press the DEF key on your keyboard
> You'll see PLUS as one of your menu keys.
> enter e.g. 1 -2 -3 on the stack and press that PLUS soft
> key and the function will be evaluated.
>
> You can do the same with the negative part...
> 'MINUS(A,B,C)=(-B-(B^2-4*A*C)^.5)/2*A'
>
>
> --- On Wed, 7/16/08, Jose J Martinez
> <jose_j_martinez@...> wrote:
>
> > From: Jose J Martinez
> <jose_j_martinez@...>
> > Subject: [50g] HP 27S Solver & HP 50g Solver
> > To: 50g@yahoogroups.com
> > Date: Wednesday, July 16, 2008, 11:45 PM
> > Back in the old days(early 90's) at San Diego
> State
> > University I used
> > an HP27S to get awesome grades in all of my statistics
> and
> > business
> > classes. I and a few of my study buddies would enter
> all
> > kinds of
> > equations within equations with tons of variables
> before
> > every test.
> > The instructors actually encouraged us to do this.
> One
> > time, while I
> > was doing an intership at the IRS, I even created an
> > equation that
> > would figure out your taxes (1040 with deductions and
> > more!). All of
> > these equations were lost many years ago because I
> would
> > always
> > forget to replace the batteries.
> >
> > Anyway, the solver on the 27s was fairly simple to use
> > compared to
> > what is on the HP50g. I love the way a 50g can create
> > graphs and the
> > feel of the buttons. I've learned to use the
> equation
> > writer and it
> > is great at displaying equations in textbook style!
> But,
> > I've yet to
> > figure out how to write a simple equation and retrieve
> it
> > for later
> > use. For example, I'd like to enter the quadratic
> > equation and be
> > able to use it from time to time. Any pointers would
> be
> > greatly
> > appreciated. I do have a copy of the User's
> Manual and
> > User's Guide
> > in .pdf form.
> >
> > Quadratic Equation (one each for +/-):
> >
> > 1.
> > x=(-b+Sqrt(b^2-4ac))/2a
> >
> > 2.
> > x=(-b-Sqrt(b^2-4ac))/2a
> >
> > Thanks in Advance
>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

--- In 50g@yahoogroups.com, "Jose J Martinez" <jose_j_martinez@...> wrote:

>
>
> Quadratic Equation (one each for +/-):
>
> 1.
> x=(-b+Sqrt(b^2-4ac))/2a
>
> 2.
> x=(-b-Sqrt(b^2-4ac))/2a
>
> You don't need to store the quadratic formula. Simply put in your

equation and press [WHITE SHIFT][7] or the S.SLV key, then press
SOLVEVX (second soft key from the right) and voila! both roots are on
level 1 (assuming you are in RPN mode). If you are not in RPN mode, I
highly recommend you start, to get the full good out of your 50g.

Ex: X^2+5X+6 ENTER SOLVEVX
The display shows 1: {X=-2 X=-3}

Cheers!

Thanks Don & Mike,

I am starting to miss my HP27s less and less. Though, I'm not sure
about RPN yet. I keep goofing up the input! Anyway, your help and
Chapter 21 of the user's guide is helping out a lot. I am going to
confess that I almost gave up on the HP 50g and started using the TI 84
Plus Silver (I own both). But, I couldn't get past the cheap buttons
on the TI. And, Obviously, the HP is a much better machine. I just
wish HP had as much support and lessons for their calculators like TI
does. TI has flooded the high schools and universities with their
calculators and has brainwashed the majority of high school math
teachers.

Jose Martinez
San Jacinto, CA

Thanks Don & Mike,

I am starting to miss my HP27s less and less. Though, I'm not sure
about RPN yet. I keep goofing up the input! Anyway, your help and
Chapter 21 of the user's guide is helping out a lot. I am going to
confess that I almost gave up on the HP 50g and started using the TI 84
Plus Silver (I own both). But, I couldn't get past the cheap buttons
on the TI. And, Obviously, the HP is a much better machine. I just
wish HP had as much support and lessons for their calculators like TI
does. TI has flooded the high schools and universities with their
calculators and has brainwashed the majority of high school math
teachers.

Jose Martinez
San Jacinto, CA

For quadratic equations, I use the polynomial solver.

right arrow NUM.SLV

3 (from menu) or press the tab for poly, depending on flag 117.

 - hit mode, flags, and check flag 117 for menus.

press ok

left arrow bracket ([)

enter the coefficients you want with SPC (space) between the numbers

for example  3X^2 + 2X - 24 would be

Right arrow [ 3 2 -24 enter

arrow down 1 time to the line that says roots, and press solve, then enter

I get 2.51, and -3.18 for answers.

 

This can solve polynomials, even large ones.  Just start entering coefficients from larget to smallest, with a constant as the final coefficient.

--- On Thu, 7/17/08, Jose J Martinez <jose_j_martinez@...> wrote:

From: Jose J Martinez <jose_j_martinez@...>
Subject: [50g] HP 27S Solver & HP 50g Solver
To: 50g@yahoogroups.com
Date: Thursday, July 17, 2008, 1:45 AM

Back in the old days(early 90's) at San Diego State University I used
an HP27S to get awesome grades in all of my statistics and business
classes. I and a few of my study buddies would enter all kinds of
equations within equations with tons of variables before every test.
The instructors actually encouraged us to do this. One time, while I
was doing an intership at the IRS, I even created an equation that
would figure out your taxes (1040 with deductions and more!). All of
these equations were lost many years ago because I would always
forget to replace the batteries.

Anyway, the solver on the 27s was fairly simple to use compared to
what is on the HP50g. I love the way a 50g can create graphs and the
feel of the buttons. I've learned to use the equation writer and it
is great at displaying equations in textbook style! But, I've yet to
figure out how to write a simple equation and retrieve it for later
use. For example, I'd like to enter the quadratic equation and be
able to use it from time to time. Any pointers would be greatly
appreciated. I do have a copy of the User's Manual and User's Guide
in .pdf form.

Quadratic Equation (one each for +/-):

1.
x=(-b+Sqrt(b^ 2-4ac))/2a

2.
x=(-b-Sqrt(b^ 2-4ac))/2a

Thanks in Advance

I just

> wish HP had as much support and lessons for their calculators like TI
> does. TI has flooded the high schools and universities with their
> calculators and has brainwashed the majority of high school math
> teachers.
>

In days gone by, TI never could compete in the engineering market
(because engineers loved RPN) and turned to the education market
instead. Engineers were, for the most part, the only ones who could
afford an HP, making schools fertile grounds for the non-HP calculator
manufacturers. Now engineers , for the most part, use Math Cad or other
PC based software and have abandoned HP, forcing HP to compete in the
student market. Also too, Hp calculators were sold only in an HP
approved retail outlet where TI calculators were much more readily
available. So it's not exactly TI brainwashing anyone, but rather a
matter of economics.

You may want to check out the TI89 Titanium. It is a very impressive
machine that competes quite nicely with the 50g. Each machine (50g/89)
has it 'pluses and minuses' (pun intended) and are truly next generation
calculators.

Greetings,
Mike

Hey Guy,

There is some work going on approaching that for which you are asking. Find someone
you know that has an iPhone that's had "Installer" set up on it and have them install
"Converter." It's a one trick pony app for the iPhone for converting. It is amazingly
intuitive, fast and nearly fun to use. It took me quite a while to find the fast way to convert
on the 50g (the way detailed in the manual is less than elegant), and while I'm happy to
have finally become "able" to do conversions on the 50g the iPhone app kicks its butt.

-Rob-

--- In 50g@yahoogroups.com, "Guy Teague" <accts@...> wrote:
>
> i've used prog calcs since the hp55 and the ti57/59 and i find the hp50 an
> absolute nightmare to use--only an engineer would need it enough to put up
> having to use it. i'm not an engineer, but i'm a computer hobbyist from way
> back and am nearly immune to pain.
> i also have the ti89 titanium and it is no walk in the park either in that
> even if they put pretty icons of the apps in a menu, once you're in that app
> you still have to go look up what it wants for inputs and how to generate
> output.
>
> hp used to be renowned for their quality and it was a sad day to see 'made
> in singapore' on an hp27s i bought although it's still one of my favorite
> calculators as to operation even though it literally eats expensive
> batteries and you can barely see the display. i wonder if any of the folks
> praising the 'quality' of the hp50 have even worked on an hp35, 45, 55 &c.
> the new hp35 're-issue' was a welcome attempt and it indeed brings back fond
> memories of when hp wrote the book on calculator quality, but the interface
> and programming are not good and i myself found a bug in it and when it
> comes down to me finding a bug hp missed, they are indeed in trouble.
>
> anyway, why is he bitching so much i hear you say? i use symbolic algebra on
> both the ti and the hp and the hp50 is worth every penny for symbolic
> algebra and the equation library alone. but i'm getting way too old to
> memorize all these methods of keeping track of saving personal equations and
> adding and manipulating libraries. perhaps if i used the calculators on a
> daily basis i could keep up with all that, but just grabbing it once or
> twice a week to run some scenarios i'm reading about in a book i've gotten
> frustrated with having to go look up the simplest of operations. the ti89 is
> hardly any better and the keys and display are not as good as the hp50.
>
> an analogy lies in ham radio handheld radios which are barely larger than a
> cigarette pack and have hundreds of modes and settings and functions and
> host rarely more than a telephone keypad and a few stray function keys. no
> one can remember all these operations either, but there are computer
> programs that are marvels of simplicity--you hook your handheld via usb and
> set it up the way you want it via the computer and then you only have to
> remember a minimum of keystrokes out in the field or there's usually no
> problem finding a laptop so you can re-program if needed.
>
> and that's my complaint, why aren't t simple computer interfaces available
> for the calculators? the only ones i've found so far are barely more than
> file transfer, backup, or to run some simple commands. i want a program
> where i can simply type 'a=b/c' and tell it to re-arrange for 'c'. on the
> hp50 i have to take into account what mode i'm in, then i have to remember
> whether i have to put the input on the stack or not, and when to issue an
> 'isolate' command that is godknows where. and whether to delimit my entry,
> and, if so, with what characters. i can't remember what the procedure is on
> the ti59, but i know it's not intuitive either as i have to look up how to
> do it each time.
>
> /guy
>
>
>

2a. Re: HP 27S Solver & HP 50g Solve

> Posted by: "Rob" secretneko@... secretneko
>
> There is some work going on approaching that for which you are asking. Find someone
> you know that has an iPhone that's had "Installer" set up on it and have them install
> "Converter." It's a one trick pony app for the iPhone for converting. It is amazingly
> intuitive, fast and nearly fun to use. It took me quite a while to find the fast way to convert
> on the 50g (the way detailed in the manual is less than elegant), and while I'm happy to
> have finally become "able" to do conversions on the 50g the iPhone app kicks its butt.
>

There is a free download for Windows written by Microsoft called
Calculator Plus (calcplus.exe). It also kicks butt. My Smartphone has a
$30 shareware application on it called Pocket 15C that is even
programmable. I bought it from http://www.spbsoftwarehouse.com/ . It was
well worth the price not to have to use the worthless default
calculator. I had an iPhone but I ended up ditching it (long story, way
off-topic).

Doing conversions on HP48,49,50 is almost more trouble than it's worth.

--
Cary Enoch Reinstein (enochsvision), Enoch's Vision Inc. http://www.enochsvision.com
Blog: http://enochsvision.wordpress.com Videos: http://www.youtube.com/enochsvision9
Behind all these manifestations is the one radiance, which shines through all things.
The function of art is to reveal this radiance through the created object. - Joseph Campbell