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anonymous

  • one year ago

Historical Feature: In the equation x^3+px+q=o, replace x by H+K. Let 3HK=-p, and show that H^3+K^3=-q

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  1. freckles
    • one year ago
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    what do you have so far?

  2. freckles
    • one year ago
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    this's too bad just do what it says I would expand (H+K)^3 and recall we can write the terms 3H^2K as H(3HK) and 3HK^2 as K(3HK)

  3. freckles
    • one year ago
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    and you know that 3HK can be replaced by -p

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