Question

if x=9+4√5 find value of √x- 1/√x

Answer 1

ans=2√5

Step-by-step explanation:

x=9+4√5

√x=√(9+4√5)=2+√5

1/√x=1/2+√5=2-√5

√x-1/√x=2+√5-(2-√5)=2√5