Definitions

A monomial is an algebraic expression that has only one term.

Examples

2x        3y²         -4a        x³y²z

A polynomial is an algebraic expression that has more than one term.

Examples

• A binomial is a polynomial that has two terms: 2x + 1    a + b    x² y + 2x
• A trinomial is a polynomial that has three terms:    x2 - 2x + 4    x2y + 3x - z     a + b + c