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Math Help - locus question

  1. #1
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    locus question

    i would like to know whether the focus of this equation of a parabola x+2x+28y-111=0 is (-8,4) or (-1,3)?
    (p.s. if it is first one my text book is wrong)
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  2. #2
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    Quote Originally Posted by pogiphilip View Post
    i would like to know whether the focus of this equation of a parabola x+2x+28y-111=0 is (-8,4) or (-1,3)?
    (p.s. if it is first one my text book is wrong)
    focus of parabola x+2x+28 y -111 = 0 is (-1,-3)
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