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Extra info related to the question :-
What is a rationlising factor ?
If the product of two irrational numbers is a rational number then each of the the two is rationalising factor of the other.
What is the purpose of rationilising the denominator ?
If the denominator of a fraction is irrational it is somewhat difficult to locate the fraction on number line. So, to make it easy we need to rationalise the denominator.
How to rationalise the denominator ?
1) Consider the denominator of the fraction.
2) Then multiply the numerator and denominator with rationalising factor of the denominator.
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