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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+16x-18y+145=25

  • College Algebra - ,

    x^2+16x+64 + y^2-18y+81=25+64+81
    (x+8)^2 + (y-9)^2=170 check that.

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