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3 January, 11:57

The equation of the circle whose center is at (2, 1) and radius is 3 is (x + 2) ² + (y + 1) ² = 9 (x - 2) ² + (y - 1) ² = 9 (x - 2) ² + (y - 1) ² = 3

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  1. 3 January, 12:03
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    (x - 2) ² + (y - 1) ² = 9

    Step-by-step explanation:

    The standard form equation of a circle with center (h, k) and radius r is ...

    (x - h) ² + (y - k) ² = r²

    Filling in (h, k) = (2, 1) and r = 3, you have ...

    (x - 2) ² + (y - 1) ² = 9
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