Answer:
[tex]2\sqrt{5}[/tex]
Step-by-step explanation:
[tex]\sqrt{20}[/tex]
20 can be written as a product of 4 and 5.
[tex]\sqrt{4 \times 5}[/tex]
4 is a perfect square.
[tex]\sqrt{4} \times \sqrt{5}[/tex]
Square root of 4 is 2.
[tex]2 \times \sqrt{5}[/tex]
