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Normals of parabola y^2=4 x at P and Q m...

Normals of parabola `y^2=4 x` at `P` and `Q` meet at `R(x_2, 0)` and tangents at `P` and `Q` mect-at `T(x_1, 0)`. If `x_2=3`, then find the area of quadrilateral `P T Q R`.

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