Verified answer

if the vertex is at ( -2,5 ) then

-b/2a = -2

-b = -4 a = -8

b = 8

unfortunately this gives:

Y(x) = ax^2 + bx + c

a = 2.00000

b = 8.00000

c = 3.00000

y(2) = 27.00000 not 9