root 5+ root 8. prove irrational
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Let us assume that 3√5 - 8 is a rational number of the form a/b where a and b are coprime integers. ... But this contradicts the fact that √5 is irrational. This contradiction has arisen due to our incorrect assumption. Therefore 3√5 - 8 is an irrational number.Apr 26, 2017
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