The orthocentre of the triangle formed by the pair of lines 2x^2-xy-y^2+x+2y-1=0 and the line x+y+1=0 is

JEE Advanced Mathematics question

The orthocentre of the triangle formed by the pair of lines and the line is

Answer: (A)

, so write . Its -coefficient is , its -coefficient is and its constant is . This gives , which is consistent. So

-xy-+x+2y-1=(2x+y-1)(x-y+1).

The si

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Question ID VK-108863