Question

please solve this problem quickly....​

Answer 1

Answer:

See answer in above picture

Answer 2

Answer:

$\frac{1}{ \sqrt{7} - \sqrt{6} } \\ = \frac{1}{ \sqrt{7} - \sqrt{6} } \times \frac{ \sqrt{7 } + \sqrt{6} }{ \sqrt{7} + \sqrt{6} } \\ = \frac{ \sqrt{7} + \sqrt{6} }{( { \sqrt{7} )}^{2} - ( { \sqrt{6} )}^{2} } \\ = > \frac{ \sqrt{7} - \sqrt{6} }{7 - 6} \\ = \sqrt{7} - \sqrt{6}$