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Posted by on Sunday, April 29, 2012 at 1:13pm.

x^2 +4x +9y^2 -36y +4=0

  • algebra - , Sunday, April 29, 2012 at 1:22pm

    This is the equation of an ellipse.
    I assume you want it in standard form
    complete the square

    x^2 + 4x + 4 + 9(y^2 - 4y + 4) = -4 + 4 + 36
    (x+2)^2 + 9(y-2)^2 = 36
    divide both sides by 36

    (x+2)^2 /36 + (y-2)^2 /4 = 1

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