Question

Rationalise 1/root5+7

Answer 1

Answer:

7-root5 divide by 44 is the answer

Answer 2

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

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

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

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

Hope this helps you