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September 23, 2014

September 23, 2014

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

- algebra -
**Reiny**, Sunday, April 29, 2012 at 1:22pmThis 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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