Page 12 - PowerPoint Presentation

4 ÷ 2

12g - 6f = - 60 4a

5 + 4a

30g = -90

g = - 3

From 4a f = 4

2  c = - 20

The equation of the circle is

2
x + y + 2gx + 2fy + c = 0
2

x + y - 6x + 8y - 20 = 0
2
2