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Question

Show that the path of a moving point such that its distances from two lines 3x2y=5 and 3x+2y=5 are equal is a straight line.

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Solution

Let P(h, k) be a moving point such that it is equidistant from the lines 3x2y5=0 then

3h2k59+4=3h+2k59+4

|3h2k5|=|3h+2k5|

4k=0 or 6h10=0

k=0

3h=5

Hence, the path of the moving points are y=0 or 3x=5, which are straight lines.


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