Question

if a=7+√5 theb find the value of a-1/a ​

Answer 1

Explanation:

plz refer to the attachment given

Answer 2

Answer:

The answer is v5/22

Explanation:

The value of a = 7+v5

The value of 1/a = 7-v5/44

Therefore, the value of a-1/a = 7+v5 - (7-v5)/44

                                      = 7+v5-7+v5/44

          Now, we have to cross multiply

Therefore, we get,  301 +45v5/44

This is the final answer

HOPE THIS HELPS YOU...