Question -
Answer -
The equation of a circle with centre (h, k)and radius r is given as
(x – h)2 + (y – k)2 = r2
It is given that centre (h, k)= (0, 2) and radius (r) = 2.
Therefore, the equation ofthe circle is
(x – 0)2 + (y –2)2 = 22
x2 + y2 + 4 – 4 y =4
x2 + y2 – 4y =0