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Question

Find the point on the straight line 3x+y+4=0 which is equidistant from the points (5,6) and (3,2).

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Solution

Let the point be (x,y) as it lies on 3x+y+4=0
y=3x4
Point =(x,3x4)
Distance of this is equidistant from (5,6) and (3,2)
(x+5)2+(6+3x+4)2=(x3)2+(2+3x+4)2
(x+5)2+(3x+10)2=(x3)2+(3x+6)2
x2+25+10x+9x2+100+60x=x2+96x+9x2+3636x
70x+125=30x+45
40x=80
x=2
y=3(2)4=2
Point =(2,2).

1214400_1395652_ans_c8569f7864654e8f95b6ed99624bef5a.jpg

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