Question

simplify square root 20

Answer 1

Factor

20 | 2

10 | 2

5 | 5

1

So, 20 = 2 . 2 . 5 = 2² . 5

$\sqrt{20}=\sqrt{2^2.5}=2.\sqrt{5}$

Answer 2

4 is the highest perfect square that goes into 20. so the answer would be 2√5