A>0. From the intersection with the Y axis, we can know that c < 0. According to the symmetry axis, b =-2a.

Because when x=-2, the function value y >；; 0, namely 4a-2 b+ c >；; 0. Because b=-2a. Substitution can get 8a+c >；; 0.③ Correct

Let the two roots of y=0 be x 1, x2 (x 1

And because -2

So when x=3, the corresponding y

So choose d