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Math Help - [SOLVED] TI-89 Titanium: SOLVE AN EQUATION

  1. #1
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    [SOLVED] TI-89 Titanium: SOLVE AN EQUATION

    Ok so the equation is this: 3x^4-4x^3+8=0

    When i solve for it, the calculator says this: False

    Am i doing something wrong?

    Can you tell me what i could do to get a number answer?(what should i press)
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  2. #2
    Moo
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    Quote Originally Posted by tupac View Post
    Ok so the equation is this: 3x^4-4x^3+8=0

    When i solve for it, the calculator says this: False

    Am i doing something wrong?

    Can you tell me what i could do to get a number answer?(what should i press)
    cZeros(3x^4-4x^3+8,x) (complex solutions because there is no real solution) instead of Zeros(3x^4-4x^3+8,x) (menu F2)

    Also, my TI89 just gives {} when I press Zeros. If it yields false, check that you have no stored variable named x, or maybe because I have a titanium and I don't.
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  4. #4
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by tupac View Post
    Ok so the equation is this: 3x^4-4x^3+8=0

    When i solve for it, the calculator says this: False

    Am i doing something wrong?

    Can you tell me what i could do to get a number answer?(what should i press)
    You're not doing anything wrong. Just do what Moo suggested.

    Use:

    Code:
    csolve(3x^4-4x^3+8=0,x)
    You will get ugly complex numbers....

    Also, when you say "number answer", do you mean exact number, or approximate number?

    --Chris
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  5. #5
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    Enable Pretty Print (on TI89 Titanium) to make the ugly complex numbers more readable.
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