Question

Find an equation of the circle that has center
, (2,−1) and passes through , (6,−6)
.

Answer 1

(x-2)^2 + (y+1)^2 =

sqroot of ( (6-2)^2 + (-6+1)^2 )

sqroot of ( 16 + 25 )

sqroot of 41

(x-2)^2 + (y+1)^2 = 41