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24 December, 13:39

What conic section is this 4x^2 + 9y^2 = 81?

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  1. 24 December, 13:57
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    This follows the base equation of a circle:

    (x - h) ^2 + (y - k) ^2 = r^2

    both of the variables are squared, and they're being added--you've got a circle.
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