Question

Rationalize the denominator 1/√7+√2​

Answer 1

$\frac{1}{ \sqrt{7} + \sqrt{2} }$

$\frac{1}{ \sqrt{7} + \sqrt{5} } \times \frac{ \sqrt{7} - \sqrt{2} }{ \sqrt{7 } - \sqrt{2} }$

Denominator using

$(a - b) \times (a + b) = a {}^{2} - b {}^{2}$

$\frac{ \sqrt{7} - \sqrt{2} }{7 - 5}$

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

Hope it's helps to u ✌️✌️