Posted by anonymous on .
rationalise 5+2square root 5 divided by square root 5.
please can someone help me on how to get the answer 2+square root 5

maths 
Reiny,
(5+2√5)/√5
multiply top and bottom by √5
√5(5+2√5)/(√5√5)
=(5√5 + 10)/5
= 5(√5+2)/5
= √5 + 2