discrete mathematics - How to adapt proof by contradiction showing that a sqrt(2) is irrational for sqrt(20)? - Mathematics Stack Exchange

This example is from Discrete Math and its Applications I understand the steps the author is taking. First he assumes sqrt(2) is rational meaning that there exists integers a, and b such that sqr

Proof that Square Root of 2 is Irrational. Proof by Contradiction

How can we prove that the square root of 2 is irrational? - Quora

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What is another proof that the square root of 2 is irrational

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