CPM Homework Help : CCA2 Problem 12-115

Change the equation $x^2+8x+y^2-12y=12$ to graphing form and sketch a graph.

Step:

$(x^2+8x+16)+(y^2−12y+36)=12+16+36$

Answer:

$(x+4)^2+(y−6)^2=64$

Hint:

How can you determine the center and radius of the circle from this equation?