Question

help solving question

Answer 1

you know the answer of it so if u want to know the method of this answer then tell me

Answer 2

x=9+4√5

√x - 1/√x = (x-1)/√x

=> ( 9+4√5 - 1) / √(9 + 4√5 )

=>(8 + 4√5) / (4 + 5 + 4*5)

=> 4( 2 + √5) / √(22 + √52 + 2*2*√5)

=>4 ( 2 + √5) / √ (2 + √5)2

=>4(2+√5) / (2+ √5)

=> 4 (Ans)

hope this helps.......☺️