Question

(5+root 5)(5- root 5) simplify

Answer 1

Identity to be used:

(a + b)(a - b) = a² - b²

Your Solution:

(5 + √5)(5 - √5)

= (5)² - (√5)²

= 25 - 5

= 20

I hope you got it

Happy Learning :D

Answer 2

Identity:

a² - b² = (a + b)(a - b).

Solution:

(5 + √5) (5 - √5)

= (5)² - (√5)²

= 25 - 5

= 20

I hope you understood

Enjoy your day :D