Good one to solve

[kajcha]

I came across this question. When I solved it first time it took me long time but then I thought over this again and found an easy approach. Just thought of sharing with all

sqrt[4sqrt(80) + (4/(9+4sqrt5))] =?

a. 5root5/9
b. 2
c. 6
d (4root5+2)/(3+2root5)
e. 36

[gabriel]

I came across this question. When I solved it first time it took me long time but then I thought over this again and found an easy approach. Just thought of sharing with all

sqrt[4sqrt(80) + (4/(9+4sqrt5))] =?

a. 5root5/9
b. 2
c. 6
d (4root5+2)/(3+2root5)
e. 36

multiply and divide the term 4/(9+4root5) by 9-4root5 .. which leaves 36 in the numerator .. so ans is C ..

[kajcha]

Exactly.. that's how I did the second time.. that made it really simple...

OA - C