(1-6^0.5)(1+6^0.5) (7^0/5+1)(1-7^0.5)

Question

(1-6^0.5)(1+6^0.5)

(7^0/5+1)(1-7^0.5)

Answer 1

(1-6^0.5)(1+6^0.5) = 1-6=-5

(7^0/5+1)(1-7^0.5) =1-7=-6

Answer 2

(1-6^0.5)(1+6^0.5)=1^2 - (6^0.5)^2 = 1 - 6 = -5
(7^0.5 + 1)(1-7^0.5) = (1+7^0.5)(1-7^0.5) = 1 - 7 = -6