Chapter 8.2, Problem 65PS

To determine

(a)

To sketch:

The graph of the circle $x^2+y^2-2x-6y-6=0$.

To determine

(b)

To sketch:

The graph of the circle $x^2+y^2+4x-12y+39=0$.

To determine

(c)

To sketch:

The graph of the circle $x^2+y^2+6x+10y+18=0$.

To determine

(d)

To sketch:

The graph of the circle $x^2+y^2-10x+2y+1=0$.