(3√11 - 4) * (3√11 + 4) =

Question

(3√11 - 4) * (3√11 + 4) =

Answer 1

(a+b)(a-b)=a^2-b^2
(3√11 - 4) * (3√11 + 4) = 3*3*sqrt(11)*sqrt(11)-4*4=9*11-16=99-16=83