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Answer:
(x -2)^2 + (y +4)^2 = 18
Explanation:
To find the constant the expression is equal to, fill in the coordinates of the given point and do the arithmetic.
(-1 -2)^2 +(-1+4)^2 = 9 + 9 = 18
The equation of the circle is ...
(x -2)^2 + (y +4)^2 = 18