Question

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

Answer 1

Givan that:

a=7+√5

so,

1 1

------- = --------------

a 7+√5

Now,

We both values

1

a - --------- = 7+√5 - 7+√5

a

= 7√5

So,

Answer is 7√5.

Answer 2

Answer:

of a=7+√7 FIND the value of -6÷a