A couple of comments:
1) The character used to indicate exponentiation in plain text is the caret (^), above the 6 on most keyboards. This character (∧) signifies a logical AND, which is not appropriate for your use here.
2) Variable values are missing for problems 4 and 5. We can guess that the missing value in problem 4 is either -0.1 or 0.6.
_____
For f(x, y) = 2x^2 -y^2 +5xy -2y
1. f(2, -1) = -1 . . . . . . . . . . 3rd selection
2. f(0, 2.5) = -11.25 . . . . 6th selection
3. f(-1, -3) = 14 . . . . . . . . 1st selection
4. f(0.5, 0.1) = 0.44 . . . . 2nd selection
5. f( __, __) = 1.665 . . . 4th selection
6. f(√2, √2) ≈ 9.17 . . . . 5th selection
