Question

(i) Find the equation to the circle
(a) whose centre is (-1, 2) and radius is 4​

Answer 1

Answer:

as we know circle standard equation is

(x-h)^2 + (y-k)^2 =r^2

and put (h,k) is (-1,2) and radius is 4

and finally answer is x^2 +y^2 + 2x -2y -11=0