You can put this solution on YOUR website! x^2+2x+y^2-4y-4=0
x^2+2x+y^2-4y=4
we are going to complete the square once for x and once for y. That will give us the center and the radius
we want to complete the square for x^2+2x
take 2/2and square it 1^2=1
add 1 to both sides
next we want to complete the square for y^2-4y
take 4/2and square it 2^2=4
add four to both sides
so we have added 5 to both sides
x^2+2x+1+y^2-4y+4=9
(x+1)^2+(y-2)^2=9
the center is (-1,2) and the radius is 3 (sqrt(9)
