Posted by lindsay on Sunday, April 29, 2012 at 12:14am.
Find the coordiantes of the center and the radius of each circle
a. (x+root5)^2 + y^2 8y =9

geometry  Steve, Sunday, April 29, 2012 at 10:48am
to do these you need to complete the square on each variable
(x√5)^2 + (y^2  8y + 16) = 9 + 16
(x√5)^2 + (y4)^2 = 25
now just read off (h,k) and r