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Math Help - Anybody interested in a Quadratic Solver?

  1. #16
    Bar0n janvdl's Avatar
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    Quote Originally Posted by topsquark View Post
    The link takes forever to load.

    -Dan
    Not on my pc. What's your connection speed?
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  2. #17
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by janvdl View Post
    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
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  3. #18
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    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.
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  4. #19
    Bar0n janvdl's Avatar
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    Quote Originally Posted by DavidB View Post
    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? )
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  5. #20
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by janvdl View Post
    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
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  6. #21
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    Quote Originally Posted by topsquark View Post
    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
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  7. #22
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    Quote Originally Posted by janvdl View Post
    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.

    Quote Originally Posted by Constatine11 View Post
    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.
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  8. #23
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by topsquark View Post
    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.
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  9. #24
    Senior Member DivideBy0's Avatar
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    I don't imagine cubics or quartics would be a big step up, I mean, there is one simple formula for each right?
    Attached Thumbnails Attached Thumbnails Anybody interested in a Quadratic Solver?-cubic.jpg  
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  10. #25
    Forum Admin topsquark's Avatar
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    Talking

    Quote Originally Posted by DivideBy0 View Post
    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
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  11. #26
    Senior Member DivideBy0's Avatar
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    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
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  12. #27
    GAMMA Mathematics
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    Quote Originally Posted by topsquark View Post
    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!
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  13. #28
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    I just checked out your app. itís 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.
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  14. #29
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by DivideBy0 View Post
    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
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  15. #30
    Bar0n janvdl's Avatar
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    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.
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