Question 44002
{{{(5sqrt(3)+sqrt(5))(sqrt(3)-2sqrt(5))}}}
{{{5*3 - 10sqrt(3)sqrt(5) + sqrt(5)sqrt(3) -2*5}}}
{{{15-10-9sqrt(5)sqrt(3)}}}
{{{5-9sqrt(5)sqrt(3)}}}

I hope this helps.

P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would send me your feedback on my help to adam.chapman@student.manchester.ac.uk.