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JEE Main Mathematics question

MathematicsStraight LinesJEE Main

The area (in square units) of the quadrilateral formed by two pairs of lines and , is

Answer: (A)

Solution

The pairs factorise as (lx+my)(lx-my-n)=0 and (lx-my)(lx+my+n)=0, giving the lines , , and . Each pair of parallel sides is apart, and the angle

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Question ID VK-024523