In mathematics, an inequality is a statement that two expressions are not equal. Undefined values in an inequality are values that make one or both of the expressions undefined. To find the undefined values in an inequality, we need to find the values that make the denominator of either expression equal to zero.
For example, consider the inequality $\frac{x-1}{x+2} > 0$. The denominator of the left-hand side is $x+2$, which is equal to zero when $x=-2$. Therefore, the undefined value in this inequality is $x=-2$.
