Question

(5+ root 5) ( 5 - root 15)​

Answer 1

Answer:

(5+√5)(5-√15)

25-√75 + 5√5 + √75

25 + 5√5

hope it helps you

Answer 2

Answer:

$(5 + \sqrt{5}) \: (5 - \sqrt{5}) \\ 5(5 - \sqrt{5}) \:+ 5(5 - \sqrt{5}) \\ 25 - 5 \sqrt{5} + 25 - 5 \sqrt{5}) \\ 50 - 10 \sqrt{5}$

$hope \: it \: helps \: u$