Find the center and radius of the circle with equation (x + 2)2 + (y + 7)2 = 81.

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asked Apr 2, 2019 38.3k views

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Steve Miskiewicz · Answer 1 · 2019-04-08T23:42:08+0000

The equation of a circle is:

(x - h)² + (y - k)² = radius²
where (h, k) is the center of the circle.

Your center is (- 2, - 7).
Your radius is √81 = 9

Find the center and radius of the circle with equation (x + 2)2 + (y + 7)2 = 81.

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