Posted by Yoona on Sunday, December 18, 2011 at 2:48pm.
distance^2=(x-4)^2 + (y)^2
distnace^2=(x-4)^2 + x^2
d distance/x * 2 * distance=0=2(x-4)+ 2x
or -x=x-4 or x=2
and y= sqrt2. Point is (2, sqrt2)
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