# How do you simplify 3 times square root of 5 minus square root of 20?

$\setminus \sqrt{5}$

#### Explanation:

Given that

$3 \setminus \sqrt{5} - \setminus \sqrt{20}$

$= 3 \setminus \sqrt{5} - \setminus \sqrt{4 \setminus \cdot 5}$

$= 3 \setminus \sqrt{5} - \setminus \sqrt{4} \setminus \sqrt{5}$

$= 3 \setminus \sqrt{5} - 2 \setminus \sqrt{5}$

$= \setminus \sqrt{5}$