I'm sure this will win program of the month.

Now if i could only have a quadratic formula solver for the ti-89...

That would be funny! Have you seen the Manuel (sp- and I don't reeally care) its a riot!

Yes, it is an amazing work of literature. Not only is Nick by far the greates programmer, he can even defeat everyone else in the realm of manual writing as well. Truly a multi-talented hero.

Actually, i wrote one last week and i think i uploaded it this weekend. Any word on this, Steve?

They're probably too busy concentrating on the really elite programs, like Random Numbar Generator.

True. Nothing draws the attention of archivers like searching for fake programs! :)

I don't see how much attention that requires. It seems to me that the fake programs find them most of the time.

Only the good ones find them.

Doesn't the 89 have a built-in polynomial solver?

It doesn't use the quadratic formula if its unfactorable. That is why I wrote my quadratic formula program, now available on this site.

What do you mean? My TI-89:
"solve(x^2+6x+3=0,x)"
gives
"x=-(sqrt(6)+3) or x=sqrt(6)-3"

Then this capability was added to the calc in ams 2.04. It did not exist in 2.03 or 1.05

Nope, I get the same thing in AMS 2.03. Though this is a pointless reply since noone will ever spot it amidst all these other posts...

But, I think the point of this topic was that the TI-89 does not solve quadratics with complex roots. For example:

solve(x^2-2x+2=0,x)

returns "false". The problem is that you need to use the 'c' functions (cSolve, cFactor, etc) when you want complex results. I don't know whether the calc uses the quadratic formula or not, but I guarantee a quadratic program is about the last thing it needs. Whatever it uses is about 100 times more advanced already.

-Heavy, heavy Kevin

I have a HW1 AMS 2.03 and my calculator will solve that same problem above mentioned as well as other ones like it... It is also slightly easier to use the zeros function instead of the solve function, when you are working with a polynomial that equals zero...
for example:

zeros(x^2+6x+3,x) which returns in the form of a list:
{sqrt(6)-3 -(sqrt(6)+3)}
instead of
solve(x^2+6x+3=0,x) which returns
-(sqrt(6)+3) or sqrt(6)-3
Not only does it return the answer in the form of a list, but is also saves you two keypresses when typing in the command, you don't have to type in the equals zero. The zeros command does not make the solve command useless however... the solve command is for solving an equation for a certain variable and can come in handy with more complex equations... the zeros command on the other hand takes an expression and tells you what values of the desired variable will make the expression equal to zero... anyway, I'm babbling now... I'll shut up now...

~Trooper_Max~ =:)

Then my 89 must be really forked up.

Better than being knifed up.

Replace "or" in "forked" with another vowel-consonant combination.

Just try that under AMS 2.05..............

I did. Zeros( and Solve( both seem to work the exact same way.

Well, maybe it will finally change for AMS 2.06.

Not another AMS!

Its fixed in the new ams.