If the slopes of the lines Kx^2 - 4xy + 5y^2 = 0 differ by 2, then K=

MHT CET 2022 Mathematics question

If the slopes of the lines differ by 2, then K=

Answer: (A)

For the slopes satisfy . Here , , : , so and . The difference is m_1m_2\sqrt{(m_1+m_2)^2 - 4m_1m_2}$ =

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Question ID VK-094049