7. Find the point on the x-axis which is equidistant from (2,-5) and (-2,9).
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O(x,0) is equidistant from A(2,-5) and B(-2,9).
=> OA = OB
oa = ob
on squaring both sides
( oa)² = (ob)²
x²-4x+29 = x²+4x+85
-4x+29 = 4x+ 85
-4x-4x = 85 - 29
- 8x = 56
x = -7
points are (-7,0)
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