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S.T the equation 2x^2-13xy-7y^2+x+23y-6=...

S.T the equation `2x^2-13xy-7y^2+x+23y-6=0` represents a pair of straight lines. Also find the angle between them and the coordinates of the point of intersection of the lines.

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The correct Answer is:
`((19)/(15),(7)/(15)), cos^(-1)""(1)/(sqrt(10))`
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