Simplify radical 20.

I know the answer but just quizzing.

The first correct answer will be marked brainliest!

2√5

Step-by-step explanation:

Use a factor tree to break down 20 into it's prime roots.

20 = 2 x 10

20 = 2 x 2 x 5

These are the prime factors of 20, so we can rewrite √20 as

(√2) (√2) (√5)

(√2) (√2) = √ (2x2) = √4 = 2, so we have

2√5