Graph a circle from its expanded equation

Given the expanded equation of a circle, graph the circle. For example, graph the circle who's equation is x²+y²+4x+8y+16=0.

Problem

Graph the circle x, start superscript, 2, end superscript, plus, y, start superscript, 2, end superscript, plus, 10, x, plus, 6, y, plus, 18, equals, 0.