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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 area of ` P B C` to that of ` A B C` is `(|x+y-2|)/7dot`

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