Thread: Anybody interested in a Quadratic Solver?

Originally Posted by topsquark

The link takes forever to load.

-Dan

Not on my pc. What's your connection speed?

Originally Posted by janvdl

Not on my pc. What's your connection speed?

I don't know exactly, but I've got a DSL line. In any event, it's loading just fine now. I don't know why it didn't before. (Doesn't Soroban have a Murphy's Law to cover this kind of thing?)

-Dan

There is also a Javascript version of a Quadratic Equation Solver posted here:

Quadratic Equation Calculator

Since it is written in Javascript, the file can also be saved and used offline, if you are interested.

Originally Posted by DavidB

There is also a Javascript version of a Quadratic Equation Solver posted here:

Quadratic Equation Calculator

Since it is written in Javascript, the file can also be saved and used offline, if you are interested.

Well I am currently expanding the tool to more than just a quadratic solver.

If anyone has any ideas, or is willing to help with the programming, then post it here or contact me, and let's make this a joint operation


(By the way, where the heck are the math tags and smileys? )

Originally Posted by janvdl

Well I am currently expanding the tool to more than just a quadratic solver.

If anyone has any ideas, or is willing to help with the programming, then post it here or contact me, and let's make this a joint operation


(By the way, where the heck are the math tags and smileys? )

If you want to have some real fun, program it to solve cubics and quartics also. (You can look the formulas up on the internet. They are anything but pleasant.)

-Dan

Originally Posted by topsquark

If you want to have some real fun, program it to solve cubics and quartics also. (You can look the formulas up on the internet. They are anything but pleasant.)

-Dan

Or better yet to determin the number of real roots in a given interval

ZB

Originally Posted by janvdl

Well I am currently expanding the tool to more than just a quadratic solver.

If anyone has any ideas, or is willing to help with the programming, then post it here or contact me, and let's make this a joint operation.

What kind of a tool are you planning to turn it into?
I might be interested in helping with it.

Originally Posted by Constatine11

Or better yet to determin the number of real roots in a given interval

Some of the existing industrial-strength root-finders for high-order equations already do that; it should just be a matter of extracting that particular code block.

Originally Posted by topsquark

If you want to have some real fun, program it to solve cubics and quartics also. (You can look the formulas up on the internet. They are anything but pleasant.)

-Dan

i like that idea.

I don't imagine cubics or quartics would be a big step up, I mean, there is one simple formula for each right?

Originally Posted by DivideBy0

I don't imagine cubics or quartics would be a big step up, I mean, there is one simple formula for each right?

Wanna have a go at typing out the quartic solution? It's a tad longer... (Unless you're cheating and generating the solution in Mathlab or something, in which case thhpppt!)

-Dan

Hold on, how could I only just have noticed it?!

Some cubics have three solutions, yet that formula will always only yield 1!

However in those cases it does work

Originally Posted by topsquark

Wanna have a go at typing out the quartic solution? It's a tad longer... (Unless you're cheating and generating the solution in Mathlab or something, in which case thhpppt!)

-Dan

Janvdl's work is cut out for him!

I just checked out your app. it’s pretty nice! I have two suggestions

It would be good if you could toggle between decimal answer and exact answers

and latex code for the solutions would also be great for people posting solutions on a forum.

Originally Posted by DivideBy0

Hold on, how could I only just have noticed it?!

Some cubics have three solutions, yet that formula will always only yield 1!

However in those cases it does work

of course we would want it to be able to compute complex solutions, in which case, all cubics would have 3 roots

Well I inserted a basic trig calculator and a decimal to binary converter

In the case of that cubic formula, I'm game to try it (Crazy but willing)

Thanks for everyone's suggestions.