Step-by-step explanation:
The turning point of a quadratic function is equidistant from both x-intercepts (if they exist)
Since they do exist in this question, 3 + k = 2(0.5), 3 + k = 1, k = -2.
16 / 2 = 8
8 - 1 = 7
4 x 7 = 28
Hope this helps :)
This one is super difficult, I see your struggle but the answer is A.