Answer:
A
Explanation:
the denominator of the expression cannot be zero as this would make the expression undefined.
Equating the denominator to zero and solving gives the value that x cannot be
- 8 + 2x = 0 ( add 8 to both sides )
2x = 8 ( divide both sides by 2 )
x = 4 ← excluded value
that is x = 4 would make the expression undefined.