Quadratic Solver v2.5
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About
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This should be the last upgrade for some time.
In version 2.0, I forgot to change the version
number in the program.  I also added two things.
It now tells you if the parabola opens downwards
or upwards without having to graph it, and it
gives you the Latus Rectum Length.  Here is
a list of all that it does right now:

Solve Equaton: Discriminant, Latus Rectum Length,
  Exact Zeros, Vertex, Axis of Symmetry, Focus,
  Directrix, Instantaneous Velocity.
Parabolic Area: Finds a parabolic area given the
  base and height.
Find Equation: Quick access to finding the
  quadratic formula from factors, so you don't
  have to leave the program back to the home
  screen, expand, etc...

Of course, all of this is easy to use and very
understandable.  This program is a must-have
for anyone working with the quadratic formula in
any class.  One thing you might not understand
is when you graph the parabola.  After graphing,
you press [ENTER] and it asks you if you want to
keep the graph variables or not.  This is to
allow you to zoom in, etc. outside of the program.
If you choose to save them, it will tell you where
and what variables.

Requirements/Bugs
-----------------
You need to have a TI-89 period.  You don't need
DoorsOS or anything of that sort.  I have tested
it on a TI-89 HW2 without any problems.  If you
find any bugs, please let me know!

History
-------
April 10, 2000 - Version 2.5
-Updated version number and date which I had
  forgotten to do in version 2.0
-Added Latus Rectum Length and direction of
  parabola (upwards/downwards)

March 23, 2000 - Version 2.0
-Complete rewrite of my cheap version 1.0.  Now
  you input the variables in the program instead
  of in the home screen
-Fixed exact zeros to allow scroll of answer if it
  goes off the screen
-Added vertex, axis of symmetry, focus, directrix,
  instantaneous velocity, parabolic area finder,
  and find equation from factors
-Shows equation on the screen which you just put

March 12, 2000 - Version 1.0
-Gives discriminant, non-real solution, and any
  real solutions


License
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1.  I CANNOT BE HELD RESPONSIBLE FOR ANY DAMAGE
DONE TO YOUR CALCULATOR!  HOWEVER, IN NO WAY WAS
IT INTENTIONALLY MADE TO DAMAGE.  As stated before,
I have tested it and it has worked, so nothing
should happen.  If you do have trouble, though, I'd
be glad to try and help you.
2.  YOU CANNOT SELL THE PROGRAM OR CLAIM IT TO BE
YOUR OWN!  I have put much time towards it to help
you (and of course, myself), so please don't do it.
You can edit it if you wish to make it work better,
but if you use any parts of it in your own program,
you must state so.

Contact me
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Nelson Rothermel
terium@techie.com