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27 September, 09:46

Write the standard equation of the circle with center (-3, 5) and a diameter of 18.

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  1. 27 September, 09:54
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    The equation of a circle with center (h, k) and radius r is

    (x - h) ^2 + (y - k) ^2 = r^2

    A diameter of 18 means a radius of 9.

    (x + 3) ^2 + (y - 5) ^2 = 81
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