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31 October, 01:43

The center of a circle is at (2, - 5) and its radius is 12.

What is the equation of the circle?

a) (x-2) 2 + (y+5) 2=24

b) (x+2) 2 + (y-5) 2=24

c) (x+2) 2 + (y-5) 2=144

d) (x-2) 2 + (y+5) 2=144

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  1. 31 October, 01:45
    0
    Hello:

    an equation of the circle Center at the A (a, b) and ridus : r is:

    (x-a) ² + (y-b) ² = r²

    in this exercice : a = 2 and b = - 5 (Center at the A) and: r = 12

    the equation of the circle is : (x-2) ² + (y+5) ² = 12²=144 (answer d)
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