Question

The Value of (3 + root 5)(3 - root 5)

Answer 1

Answer:4

Step-by-step explanation:

(3+√5) (3-√5) = (3)^2 -(√5)^2

=> 9-5

=> 4

Formula used = (a+b) (a-b) = (a)^2 - (b)^2

Answer 2

Answer:

14+6√5

Step-by-step explanation:

(3+√5)(3+√5)

=9+6√5+5         (∵ (a+b)²=a²+2ab+b²)

=14+6√5

Hope it helps! :)