1. ## Graphing a circle

The question:
$x^2 + y^2 = \frac{-(10x + 8)}{3}$

How would I go about writing this in a form which could find me the centre point and radius? Thanks.

2. $\displaystyle x^2 + y^2 = \frac{-(10x + 8)}{3}$

$\displaystyle x^2 + y^2 = -\frac{10}{3}x - \frac{8}{3}$

$\displaystyle x^2 + \frac{10}{3}x + y^2 = -\frac{8}{3}$.

Now complete the square on the $\displaystyle x$ terms.

3. Thanks. It's times like these that I wish I had paid attention in high school.

Better late than never, I guess!