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zmudz

  • one year ago

If all the roots of \(x^3 - 12x^2 + ax - 64\) are real and non-negative roots, find \(a\).

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  1. Loser66
    • one year ago
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    if a = 16 then, \(x^3 -12x^2 +48x -64 = (x-4)^3\) has 4 is real and non-negative.

  2. zmudz
    • one year ago
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    @Loser66 a=16 is not the answer :(

  3. Loser66
    • one year ago
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    what is the answer?

  4. freckles
    • one year ago
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    @Loser66 might have typed a=16 but he meant a=48 because that is what he used above

  5. Loser66
    • one year ago
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    oh, yeah, thanks @freckles

  6. zmudz
    • one year ago
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    ah, i see, thanks! @freckles and @Loser66 that makes more sense! this was very helpful

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