# How do you simplify 2sqrt5 + 4sqrt5 ?

6$\setminus \sqrt{5}$
You can see it this way: $2 \setminus \sqrt{5} = \setminus \sqrt{5} + \setminus \sqrt{5}$ while $4 \setminus \sqrt{5} = \setminus \sqrt{5} + \setminus \sqrt{5} + \setminus \sqrt{5} + \setminus \sqrt{5}$
Adding both together, you get $6 \setminus \sqrt{5}$