Check sibling questions

Rationalising denominator of irrational number - Rationalising

We do not leave an irrational number in the denominator.

So, we rationalise the denominator.Β  Let us look at some examples

  1. Rationalise 1/√2
  2. Rationalise 1/2 +√3

Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


Some Identities (βˆšπ‘Ž)^2=π‘Ž √(π‘Ž^2 )=π‘Ž βˆšπ‘Žπ‘=βˆšπ‘Ž Γ—βˆšπ‘ √(π‘Ž/𝑏)=βˆšπ‘Ž/βˆšπ‘ (βˆšπ‘Žβˆ’βˆšπ‘)(βˆšπ‘Ž+βˆšπ‘)=π‘Žβˆ’π‘ (π‘Žβˆ’βˆšπ‘)(π‘Ž+βˆšπ‘)=π‘Ž^2βˆ’π‘ (βˆšπ‘Ž+βˆšπ‘)^2=π‘Ž+𝑏+2βˆšπ‘Žπ‘ (βˆšπ‘Ž+βˆšπ‘)(βˆšπ‘+βˆšπ‘‘)=βˆšπ‘Žπ‘+βˆšπ‘Žπ‘‘ + βˆšπ‘π‘ + βˆšπ‘π‘‘

Ask a doubt
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.