Question

How to Find R.F of Single root number like
$\sqrt{20}$

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Please tell full format how to find for any such number
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Answer 1

RATIONALISING FACTOR MEANS TO MULTIPLY THE GIVEN NUMBER BY A NUMBER SUCH THAT THE RESULTING NUMBER IF A RATIONAL NUMBER

FOR EXAMPLE:-

RATIONALISING FACTOR OF $\sqrt{5}$ IS $\sqrt{5}$ ITSELF BECAUSE WHEN WE MULTIPLY $\sqrt{5}$ BY $\sqrt{5}$ WE GET 5 WHICH IS A RATIONAL NUMBER

SO COMING TO UR QUESTION:-

THE RATIONALSING FACTOR OF $\sqrt{20}$ IS $\sqrt{20}$ BECAUSE WHEN WE MULTIPLY THEM BOTH THE RESULTING NUMBER IS 20 WHICH IS A RATIONAL NUMBER AND THAT WAS REQUIRED

Answer 2

Step-by-step explanation:

u must byhard the vales of√2 =1.41422 ,√3=1.7320, √5 =2.360 with atleast 3 decimels for doing the square root with higher vales...hope you understand