Explanation:
The expression

is defined for all real values of (x) except when the denominator ( 3x + 12 ) equals zero because division by zero is undefined.
So, to find the values of (x) for which the expression is defined, set the denominator (3x + 12) not equal to zero and solve for (x):
![\[3x + 12 \\eq 0\]</p><p>\[3x \\eq -12\]</p><p>\[x \\eq -4\]](https://img.qammunity.org/2024/formulas/mathematics/college/a6nz2kgfreth3pdbtafs7vjqcw7183vwv6.png)
Therefore, the expression

is defined for all real values of (x) except (x = -4).