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14 January, 06:36

Find center radius 3x squared + 3y squared + 30x - 42y - 141=0

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  1. 14 January, 10:33
    0
    Center and Radius

    3x² + 3y² + 30x - 42y - 141 = 0

    x² + y² + 10x - 14y - 47 = 0

    x² + 10x + y² - 14y - 47 = 0

    x² + 10x + 25 + y² - 14y - 49 = 0

    x² + 10x + 25 + y² - 14y - 49 = 47

    x² + 10x + 25 + y² - 14y + 49 = 47 + 25 + 49

    x² + 10x + 25 + y² - 14y + 49 = 121

    (x + 5) ² + (y - 7) ² = 121

    center: (-5, 7)

    radius: 11
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