What are the coordinates of the center and the
length of the radius of the circle whose equation is
x2 + y2 = 8x - 6y + 39?

The coordinate of the center is (4,-3)

radius = 8

Step-by-step explanation:

Given ;

re - arranging , we have

comparing with the general equation

This means that

also

The coordinate of the center is (-g,-f)

Therefore;

the coordinate of the center = (4,-3)

the formula for calculating r is given by:

METHOD 2

using completing the square method , we have

completing the square , we have

comparing with the general equation

where a and b are the coordinate of the center , that is

the coordinate of the center is ( 4 , -3)

what are the statments

step-by-step explanation: