If the equation a x^2 + 2 h xy + b y^2 +...

If the equation `a x^2 + 2 h xy + b y^2 + 2 g x + 2 f y + c = 0` represents a pair of straight line, show that their point of intersection is `(sqrt((f^2-bc)/(h^2-ab)),sqrt((g^2-ac)/(h^2-ab)))`

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