D : x + 2 = 0 D : x = − 2
The domain restriction for the equation x + 2 3 = 7 is that x cannot be − 2 , as this would make the denominator zero. Thus, the domain is all real numbers except − 2 . In interval notation, this is expressed as ( − ∞ , − 2 ) ∪ ( − 2 , ∞ ) .
;