Find domain and range

Question

Find the domain when x is less than or equal to y= √-x-4 +2 (the square root of -x-4) +2

and find the range when y is greater than or equal to y=√-x-4 +2 (the square root of -x-4) +2.

Answer 1

The domain is the half open interval from negative infinity to -4 and the range is the half open interval from 2 to positive infinity.