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Question

Find a point on the x-axis which is equidistant from the points (7,6) and (3,4).

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Solution

Given points A(7,6) and B(3,4)

Let the point be P(x,0) [we know that point on x-axis is (x,0)]

So, AP=PB and

AP2=PB2

(x7)2+(06)2=(x+3)2+(04)2

[Distance between two points is given by distance formula, d=(x2x1)2+(y2y1)2]

x2+4914x+36=x2+9+6x+16

499+3616=6x+14x

40+20=20x

x=6020=3

Hence, point on x-axis which is equidistant from the points A(7,6) and B(3,4) is (3,0)


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