Comments by "robheusd" (@robheusd) on "Mathematics without real numbers | Real numbers and limits Math Foundations 119 | N J Wildberger" video.

  1. Which rational number, when multiplied with itself, yields 2? Since no such rational exist, we needed to add the set pf reals. Same as we needed to add the set of negative integers for subtracting natural numbers, as 3 - 5 is not a natural number.
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