Math
posted by Anonymous on .
What are the coordinates of the center of a circle with the equation x^26x+y^2+4y=20?
All help is appreciated.

The centre of the circle
C : (xx1)² + (yy1)² = r²
is at (x1,y1).
For the given circle, the centre can be found by completing the squares, namely:
x^26x+y^2+4y=20
(x3)²9 + (y+2)²4 = 20
(x3)² + (y+2)² =33
Can you find the centre of the circle?