Question

find the product of (3+√5)and(3-√5)​

Answer 1

Answer:

4

Step-by-step explanation:

Let,

3=a

and,($\sqrt{5}$)=b

So, (3+√5)×(3-√5)​=(a+b)×(a-b)

Now,we know,

(a+b)×(a-b)=a²-b²

So, (3+√5)×(3-√5)​= (3)²-(√5)²

                             = 9-5

                             = 4

Answer 2

9-5.......(using(a+b)(a-b)=(a)2-(b)2)

4