Question

What is the distance between (x₁, 0) and (x₂, 0)? ​

Answer 1

• | x₁ - x₂ |

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The two given points have same y-coordinate of zero. It means both points are on the x-axis.

The distance between two points on the x-axis is the absolute value of the difference of x-coordinates:

• d = | x₁ - x₂ |