prove that root5 is irrational hence prove that 2-root5 is also irrational
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To prove that square root of 5 is irrational, we will use a proof by contradiction. What is a proof by contradiction ? Suppose we want to prove that a math statement is true. Simply put, we assume that the math statement is false and then show that this will lead to a contradiction. If it leads to a contradiction, then the statement must be true
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