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JEE Main Mathematics question

MathematicsStraight LinesJEE Main

If the equation ax^2+2hxy+by^2+2gx+2fy+c=0 represents a pair of parallel lines, then

Answer: (C)

Solution

A pair of parallel lines needs , i.e. , and then the quadratic part is the perfect square (with

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Question ID VK-024617