Answer:
I also got -1 doing it on my calculator
Explanation:
i first converted it to exponent form to get rid of the radical
(9 - 4(2)^1/2 )^1/2 - 2(2)^1/2 solve inside the first parenthsis
(9 - 4(1.414)^1/2 - 2(2)^1/2
(9 - 5.656)^1/2 - 2(2)^1/2 √2 times 4
(3.343)^1/2 - 2(2)^1/2 9 - √2 times 4
1.828 - 2(2)^1/2 √(9 - √2 times 4)
1.828 - 2(1.414) √(9 - √2 times 4) - 2√2
1.828 - 2.828 √(9 - √2 times 4) - 2√2
-1