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JEE Main Mathematics question

MathematicsStraight LinesJEE Main

The value of such that represent a pair of straight lines, is

Answer: (C)

Solution

For Ax^2+2Hxy+By^2+2Gx+2Fy+C=0 the condition is ABC+2FGH-AF^2-BG^2-CH^2=0 with , , ,

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Question ID VK-024275