Variables and Expressions

Variables are useful in mathematics for many reasons, and can be used to denote different types of arbitrary or unknown numbers.

Simplifying algebraic expressions may require one to follow some key steps to add and subtract like terms.

The process for multiplying algebraic expressions differs for monomials and polynomials.

Radical expressions containing variables can be simplified to a basic expression in a similar way to those involving only integers.

The rules for operating on numbers with exponents can be applied to variables with exponents as well.

The addition and subtraction of rational expressions are bound by all of the same rules as the addition and subtraction of fractions.