Question

4+root5/4-root5+4-root5/4+root5

Answer 1

Hi
Here your answer
(4+root5)(4+root5) (4-root5)(4-root5)
—–——--------------- + --—-----------------------
(4-root5)(4+root5) (4+root5) (4-root5)

=(4+root5)² (4-root5)²
--------------- + --------------
16-5 16-5

=16+5+8root5 16+5-8root5
--------------------- + -------------------
11 11

=21+8root5 +21 - 8root5
-----------------------------------
11
=42/11