Practice!

Sample Problem

The graph of 50x2-50x+200y+(409/2)+50y2=0 is a

Solution

50x2-50x+200y+(409/2)+50y2=0

50x2+50y2-50x+200y+(409/2) =0

The graph of Ax2+Cy2+Dx+Ey+F=0, when A=C (in this case 50=50) is a circle.