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hawkfalcon Group Title

What is x in this equation?

  • one year ago
  • one year ago

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  1. hawkfalcon Group Title
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    \[\cos^2x +3cosx+2 = 0\]

    • one year ago
  2. Mimi_x3 Group Title
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    u = cosx

    • one year ago
  3. hawkfalcon Group Title
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    Oh then its just a quadratic :O

    • one year ago
  4. hawkfalcon Group Title
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    :P What happens to the cos though? Do it after?

    • one year ago
  5. Mimi_x3 Group Title
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    u^2 + 3u + 2 = 0 solve for u then later sub it back in btw is it only me that latex is not working?

    • one year ago
  6. hawkfalcon Group Title
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    Okay, thank you. I think its just you:O

    • one year ago
  7. Mimi_x3 Group Title
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    np

    • one year ago
  8. hawkfalcon Group Title
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    I can't believe I didn't see it was just a simple quadratic *.*

    • one year ago
  9. Mimi_x3 Group Title
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    well using a substitution is easier; at times when you see like the x squared; there is a high chance that its a quadratic. so use a substitution.

    • one year ago
  10. hawkfalcon Group Title
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    Alright! Thank you so much:D

    • one year ago
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