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11 October, 12:17

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

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Answers (1)
  1. 11 October, 12:40
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    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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