Find the center and radius of the circle whose equation is x 2 + y 2 – 6x – 2y + 4 = 0

Question

Find the center and radius of the circle whose equation is x 2 + y 2 – 6x – 2y + 4 = 0

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Nem 3 months 2021-07-19T22:20:04+00:00 1 Answers 5 views 0

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    2021-07-19T22:21:53+00:00

    Answer:

    { \tt{ {x}^{2} +  {y}^{2}  - 6x - 2y + 4 = 0 }}

    Center:

    { \tt{(3, \: 1)}}

    Radius:

    { \tt{radius =  \sqrt{ {g}^{2} +  {f}^{2} - c  } }} \\  =  \sqrt{36 + 4 - 4}  \\  = 6 \: units

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )