Question

how to do (3+ ROOT 5)( 3- ROOT5)​

Answer 1

Answer:

please mark as brainlist answer

Step-by-step explanation

[ 3+ root 5 ] [ 3 - root 5 ]

using identity

[a+b] [ a- b ]= a ^2 - b ^2

[ 3+ root 5 ] [ 3 - root 5 ] =  3^2 - root 5 ^2

                                              = 9- 5

                                               = 4 is your answer

Answer 2

Answer:

a²+b²=(a+b)(a-b)

OR

(a+b)(a-b)=a²+b²

So,

(3+√5)(3-√5) = 3²+(√5)²

= 9+√5×5

= 9+5

= 14.

Hope this will help you dear friend.