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Find the value of K for which the equati...

Find the value of `K` for which the equation `2x^2 - xy +Ky^2 + 8x +7y-10=0` may represent a pair of lines. For this value of `K` show that this equation can be transformed into a homogeneous equation of second degree by translating the origin to a properly chosen point. Also find the acute angle between the line pair represented by the given general equation.

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