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Posted by **Lindsay** on Sunday, September 12, 2010 at 3:01pm.

what is the center and the radius?

- Math -
**bobpursley**, Sunday, September 12, 2010 at 3:06pmfactor it as perfect squares

x^2-6x + 9 + y^2+2y + 1= 15+9+1

(x-3)^2 + (y+1)^2=25

so center is 3,1 and radius is 5

- Math -
**bobpursley**, Sunday, September 12, 2010 at 3:06pmoops, center 3,-1

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