Find the equation of locus of p, if the line segment joining (2, 3) and (-1, 5) subtends a right angle at p to solve problem
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use the equ of line with 2point on it
(y-y1) = [(y2-y1) ÷(x2-x1) ] ×( x-x1)
use two points as x1,y1 and x2,y2
(y-y1) = [(y2-y1) ÷(x2-x1) ] ×( x-x1)
use two points as x1,y1 and x2,y2
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