College Algebra

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Write the equation of the circle in standard form. Find the center, radius, intercepts and graph the circle. x^2+y^2+14x+18y=-81

  • College Algebra -

    rearrange things a bit:

    x^2+14x + y^2+18y = -81
    x^2+14x+49 + y^2+18y+81 = -81 + 49 + 81
    (x+7)^2 + (y+9)^2 = 49

    now the rest is easy.
    C'mon back if you get stuck.

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