trigonometry

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Please solve this equation. As you write down the steps, please give me a description on what you did.

y^3 - 16y^1/2 + 64 = 0

  • trigonometry -

    LOL
    y must be positive if all is real numbers
    But for any +y, the answer is >0

  • trigonometry -

    I mean the left side is greater than zero

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