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The coordinates of A,B,C are (6,3), (-3,...

The coordinates of `A,B,C` are `(6,3)`, `(-3,5)`, `(4,-2)` respectively and `P` is any point `(x,y)` . Show that the ratio of the areas of the triangles `DeltaPBC` and `DeltaABC` is `|(x+y-2)/(7)|`.

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