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L e tS={(x , y)|x^2+2x y+y^2-3x-3y+2=0},...

`L e tS={(x , y)|x^2+2x y+y^2-3x-3y+2=0},t h e nS-`: (A) consists of two coincident lines. (B) consists of two parallel lines which are not coincident. (C) consists of two intersecting lines. (D) is a parabola.

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