You can
put this solution on YOUR website!a. Determine if the function is quadratic
b. if the graph is concave up or down
c. if the vertex of the graph is max or min. point
y=2xroot2-8x=6
Not quadratic; not concave up or concave down
No max and no min
and y=2xroot3-3xroot2
Not quadratic; not concave up or concave down
No man and no min
Comment: I think something is missing in your posting.
Cheers,
Stan H.