sqrt8/(sqrt 5-sqrt 2)√8√5−√2
:.(sqrt 5+sqrt 2)/(sqrt 5+sqrt 2)=1
:.=sqrt8/(sqrt 5-sqrt 2)xx (sqrt 5+sqrt 2)/(sqrt 5+sqrt 2)
(sqrt8(sqrt5+sqrt2))/((sqrt5-sqrt2)(sqrt5+sqrt2))
:.=(sqrt 8(sqrt 5+sqrt 2))/3
:.=(sqrt 8 sqrt 5+sqrt 8 sqrt 2)/3
:.=(sqrt(8*5)+sqrt(8*2))/3
:.=(sqrt 40+sqrt 16)/3
:.=(sqrt(2*2*2*5)+sqrt 16)/3
:.=sqrt2*sqrt2=2
:.=(sqrt(2*2*2*5)+4)/3
:.=(2 sqrt (2*5)+4)/3
:.=(2 sqrt10+4)/3