Answer:
Explanation:
Remark
The minus sign in front of the 2 means that the quadratic has a maximum.
The vertex is already written in vertex form.
y= - 2 (x - 4)^2 + 3
The vertex is (4,3). Notice that the sign on the 4 changes. What you are trying to do is find the maximum point. That occurs when the minus number is made to be 0, which occurs when x = 4. The maximum y value is 3 when that happens.
I have enclosed a graph to show you all the details. Notice the maximum is when I've said it was and the roots have also been calculated.