What is a constant term in an algebraic expression?

A constant term in an algebraic expression is defined as a term that does not contain any variables. This means that the term is fixed and does not change regardless of the values that the variables in the expression may take. For instance, in the expression (3x + 5), the term (5) is a constant term because it remains the same regardless of the value of (x).

In contrast, terms that include variables can change their value depending on the variable's value. Coefficients, while they are part of the term and can be constant, do not define a constant term unless they are fully devoid of variables. Thus, the defining feature of a constant term is the absence of any variables, which can be seen even in an expression like (7) where (7) stands alone without any accompanying variable.