Question

(8+2√15)(8-2√15) plzzzzz solve

Answer 1

(8+2√15)(8-2√15)

If you look closely you will see that it is the identity of,

a² - b² = (a+b) (a-b)

So, (8+2√15)(8-2√15) = (8)² - (2√15)²

= 64 - 60

= 4

So our answer is 4.

Answer 2

by formula (a+b)(a-b)=a^2-b^2
hence, 8^2-(2squre root 15)^2
64-60=4