Question

If a= 3+√8 , then find the value of a-1/a​

Answer 1

Answer:

2√8

Step-by-step explanation:

a= 3+√8

1/a = 1/(3+√8)

⇒(3-√8)/(3+√8) x (3-√8)

⇒(3-√8)/(9-8)

⇒(3-√8)/1    or simply (3-√8)

now a/q

a-1/a ⇒ (3+√8) - (3-√8)

        ⇒  3+√8 - 3 +√8

        ⇒  2√8