Homework Sourse27 28 O x 30 31 01 24x 3 y 2 3 3 3 3 3 SolutionSolution 27 A
27, 28. O x 30. 31 01 24/x 3 y ·2 3 3 3 3 3 
Solution
Solution:
27. As we can see that center (h,k) = (0,0)
and radius r= 2 unit
therefore
equation of circle
(x-h)2 + (y-k)2 = r2
(x-0)2 + (y-0)2 = 22
x2 + y2 = 4
(30).
As we can see that center (h,k) = (2,0)
and radius r= 3 unit
therefore
equation of circle
(x-h)2 + (y-k)2 = r2
(x-2)2 + (y-0)2 = 32
x2+4x+4 + y2 = 9
x2 + 4x + y2 = 5
