\sqrt 5+6\sqrt 20

Question

`\sqrt 5+6\sqrt 20`

Answer 1

`13 √(5)`

Explanation:

`√(5) + 6 √(20)`

`√(5) + 6 \sqrt{2 {}^(2) * 5 }` (prime factors)

`√(5) + 12 √(5)`

`13 √(5)`