Question

# If a=
✓ 2+1
, then
find
a-1/a​

Answer 1

put the value of a

√2+1-1/√2+1

2+1+2√2-1/√2+1

2+2√2/√2+1

take 2 common

2(1+√2)/√2+2

so left is 2 is the answer