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May 4, 2016
Posted by **Quarie** on Monday, April 15, 2013 at 2:02am.

4(x+4)^2 + 4(y-6)^2 = 324

- analytic geometry -
**drwls**, Monday, April 15, 2013 at 2:41amYour equation can be rewritten

(x+4)^2 + (y-6)^2 = 81

This is the equation of a circle with radius sqrt(81) = 9, and center at (-4, 6)