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Find all points on the x axis 5 units away from the point (4,-4)

User Hivert
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You have a triangle with one side with length of 5 (from point 4,-4 to a point on the x-axis) and another side with length of 4 (from point 4,0 to point 4,-4). The third side of the triangle is obviously 3, because of Pythagoras rule. And that third point is on the x axis and 3 units away from point 4,0. So the third point can either be 1,0 or 7,0. Those two points are the answers.
User Mohsen Mokhtari
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