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What are the center and radius of the circle given by the equation ?
(x-3)^2+(y+4)^2=4
A. (3, –4); 2
B. (–3, 4); 2
C. (3, –4); 4
D. (–3, 4); 4

Respuesta :

General formula of the circle

(x-a)² + (y - b)² = r²,


where (a,b) - coordinates of the center, r - radius of the circle.


(x-3)²+(y+4)²=4

(x-3)²+(y+4)²=2²


So, the center is (3, -4) and radius r = 2.


A. (3, –4); 2


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