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