Answer:
The range is all real numbers greater than or equal to -8
Explanation:
we have

The vertex of the function is the point (6,-8)
see the attached figure to better understand the problem
we know that
The domain of the function is the interval ------> (-∞,∞)
All real numbers
The range of the function is the interval ------> [-8,∞)

All real numbers greater than or equal to -8