Answer:
The vertex of transformed parabola is:
(6,-3)
Explanation:
We are given a equation of parabola as:

Now we have to transform the parabola

by shifting 7 units to the right and 5 units down.
We know that if a parabola is shifted 7 units to the right and 5 units to the down then the equation of the transformed parabola is given as:

We know that for any equation of parabola of the type:

The vertex of parabola is:
(h,k)
Now,the vertex of the transformed parabola is:
(6,-3)