Math, asked by taherasiddiqui1810, 1 month ago

Show that 1 + 2√5 is irrational. Class 10 maths

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Answered by sparshkumarsharma

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Answer Expert Verified

Let 1/2-√5 is a rational number. A rational number can be written in the form of p/q where p,q are integers. If p,q are integers then (q-2p)/2q is a rational number. ... But this contradicts the fact that √5 is an irrational number.

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