Math, asked by tigerwild1121, 1 year ago

Rationalise 1/root5+7


tigerwild1121: fast please

Answers

Answered by Manishnitrr2010
1

Answer:

7-root5 divide by 44 is the answer

Answered by MoodyCloud
13

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

 =  \frac{ \sqrt{5} - 7 }{ { \sqrt{5} }^{2}   {(7)}^{2} }

 =   \frac{ \sqrt{5}  - 7}{5 - 49}

 =  \frac{ \sqrt{5} - 7 }{ - 44}

Hope this helps you

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