Math, asked by deepugoyat19, 9 months ago

Rationalise the Denominator of 1 by 5 - \sqrt{7}

Answers

Answered by Anonymous
0

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Answered by BrainlyPopularman
1

Answer:

GIVES THAT -

 \frac{1}{5 -  \sqrt{7} }

RATIONALISATION :-

  = \frac{1}{5 -  \sqrt{7} }  \times  \frac{5 +  \sqrt{7} }{5  +  \sqrt{7} }  \\  \\  =  \frac{5 +  \sqrt{7} }{25 - 7}  \\  \\  =  \frac{5 +  \sqrt{7} }{18}

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