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zeesbrat3

  • one year ago

For the curve given by 4x^2+y^2=48+2xy, find the positive y-coordinate given that the x-coordinate is 2.

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  1. anonymous
    • one year ago
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    Start off by substituting 2 for x, then you'll have a quadratic equation in one variable to solve

  2. zeesbrat3
    • one year ago
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    Substitute into the original equation or the derived?

  3. anonymous
    • one year ago
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    I would think the original Did you derive the equation above?

  4. zeesbrat3
    • one year ago
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    Yes, I did. However, when I plugged it into the original, I got y = -4 and 8. So (2,8) would be the positive y coordinate given that the x-coordinate is 2?

  5. anonymous
    • one year ago
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    I got y = 8 as positive using the equation above, so then yes the point is (2, 8)

  6. zeesbrat3
    • one year ago
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    Thank you!

  7. anonymous
    • one year ago
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    you're welcome

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