<h2>
Answer:</h2>
- The given equation is already in vertex form.
- The vertex is located at (7,-8)
<h2>
Step-by-step explanation:</h2>
We Know that a standard form of a quadratic equation is given by:

where a,b and c are real numbers
and the vertex form is given by:

where the vertex of the function is at: (h,k)
Here we have the function as:

We observe that the equation matches the equation as in equation (1) ; such that a= - 3, h=7 and k= -8
Hence, the equation is already in vertex form and the vertex is at (7,-8)