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[" 1."6x^(2)+hxy+12y^(2)=0" represents p...

[" 1."6x^(2)+hxy+12y^(2)=0" represents pair of parallel "],[" straight lines,if h is "],[[" (A) "+-6sqrt(2)," (B) "+-sqrt(2)],[" (C) "+-12sqrt(2)," (D) "+-sqrt(6)]]

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