interval notation

An inequality is a mathematical statement involving algebraic expressions for which we seek the values of the variables that make the inequality true. In general, an inequality between two algebraic expressions \( A(x) \) and \( B(x) \) is defined as the relation:

\[A(x) > B(x) \]

A system of inequalities is a set of at least two inequalities involving one or more variables, for which we seek the values of the variables that simultaneously satisfy all the inequalities. These systems have the general form:

\[
\begin{cases}
f_1(x) \, \text{relation} \, 0 \\[0.5em]
f_2(x) \, \text{relation} \, 0 \\[0.5em]
\quad \quad \quad \vdots \\[0.5em]
f_k(x) \, \text{relation} \, 0
\end{cases}
\]