Question

find (3+ root 5)(3- root 5)​

Answer 1

(3+√5)(3-√5)=3²-(√5)²=9-5=4

Answer 2

Hiii

Good morning

(3+ √5 ) ( 3 - √5)

using identity

(a+b) (a-b) = (a)2 - (b)2

---->(3)^2 - (√5) ^2

--->9- 5

===>4 is your answer.

May it is helpful for you.