Posted by Anonymous on Saturday, September 5, 2009 at 2:16pm.
What are the coordinates of the center of a circle with the equation x^26x+y^2+4y=20?
All help is appreciated.

Math  MathMate, Saturday, September 5, 2009 at 3:00pm
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?
Answer This Question
Related Questions
 math  Write an equation of a circle with the center (5,4) and radius 6. The ...
 Math  I have a series of questions that I did. They lead up to the last ...
 Geometry midpoint formula  A circle on the Coordinate plane has a diameter with...
 Math  If the coordinates of the center of a circle are (3,1) and the radius is...
 Algebra 2  Consider a circle centered at (2,4). What are the coordinates of the...
 geometry  2. For the circle with equation (x – 2)2 + (y + 3)2 = 9, answer each ...
 geometry  Circle O is defined by the equation x2 + (y  2)2 = 25. Plot the ...
 Trigonometry  1) Find the coordinates of the point (1,3) after the ...
 math  The coordinates of the center of a circle with equation (x − 6)2...
 Algebra II  In this set of eight problems, we have to match each equation with ...
More Related Questions