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A line with direction ratios "2,1,2" mee...

A line with direction ratios "2,1,2" meets the lines `x=y+2=z` and `x+2=2y=2z` respectively at the points "P" and "Q" .If the length of the perpendicular from the point `(1,2,12)` to the line "PQ" is "l" ,then `l^(2)` is____________

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