Question

The value of (3+√5)^2 * (3- √5)^2 is ?

Answer 1

Answer:

16

Step-by-step explanation:

let a = 3 and b = √5

then (a+b)^2*(a-b)^2 = [(a+b)(a-b)]^2 = (a^2-b^2)^2 = (9-5)^2 = 4^2 = 16

hope it helps

thank you

Answer 2

Answer:

236-60√5

Step-by-step explanation:

using simple identities

(a+b)²=a² +2ab +b²

and

(a-b)²= a²-2ab +b²