i would like to know whether the focus of this equation of a parabola x²+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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- Oct 26th 2009, 11:07 PMpogiphiliplocus question
i would like to know whether the focus of this equation of a parabola x²+2x+28y-111=0 is (-8,4) or (-1,3)?

(p.s. if it is first one my text book is wrong) - Oct 26th 2009, 11:36 PMramiee2010