Tuesday

October 21, 2014

October 21, 2014

Posted by **Anonymous** on Saturday, September 5, 2009 at 2:16pm.

All help is appreciated.

- Math -
**MathMate**, Saturday, September 5, 2009 at 3:00pmThe centre of the circle

C : (x-x1)² + (y-y1)² = r²

is at (x1,y1).

For the given circle, the centre can be found by completing the squares, namely:

x^2-6x+y^2+4y=20

(x-3)²-9 + (y+2)²-4 = 20

(x-3)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 ...

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 - 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 ...

math - What are the coordinates of the center of the circle and the length of ...

Math - Hi how would i solve this?? The equation of the cirlce is x^2+y^2-4x+2y=0...