CBSE Class 10 Answered

Rationalize:-1/(wholeroot8+root3) or 1/whole√(8+√3) both are same.Please solve it its urgent.

Asked by Harsh | 04 Dec, 2017, 03:39: PM

Expert Answer

If your question is

fraction numerator 1 over denominator square root of left parenthesis 8 plus square root of 3 right parenthesis end root end root end fraction

On Simplifying,

fraction numerator 1 over denominator square root of left parenthesis 8 plus square root of 3 right parenthesis end root end root end fraction cross times fraction numerator square root of left parenthesis 8 plus square root of 3 right parenthesis end root end root over denominator square root of left parenthesis 8 plus square root of 3 right parenthesis end root end root end fraction equals fraction numerator square root of left parenthesis 8 plus square root of 3 right parenthesis end root end root over denominator 8 plus square root of 3 end fraction

Think of what could be the rationalizing factor (RF), here. It is,

square root of 8 minus square root of 3

On rationalization, we get,

fraction numerator square root of left parenthesis 8 plus square root of 3 right parenthesis end root end root over denominator square root of 8 plus square root of 3 end fraction cross times fraction numerator square root of 8 begin display style minus end style begin display style square root of 3 end style over denominator square root of 8 begin display style minus end style begin display style square root of 3 end style end fraction equals space fraction numerator square root of 8 begin display style minus end style begin display style square root of 3 end style over denominator 8 minus 3 end fraction cross times square root of left parenthesis 8 plus square root of 3 right parenthesis end root end root equals space fraction numerator begin display style square root of 8 minus square root of 3 end style over denominator 5 end fraction cross times square root of left parenthesis 8 plus square root of 3 right parenthesis end root end root

Answered by | 04 Dec, 2017, 05:29: PM

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