Parts of an Expression

A coefficient is a numerical factor that multiplies a variable in an expression. For example, in 4x, 4 is the coefficient.

A constant is a fixed value that does not change. In the expression 3x + 2y + 7, 7 is the constant.

Count the number of separate parts in the expression that are added or subtracted. For example, in 3a + 2b + c + 100, there are 4 terms.

An algebraic expression is a combination of numbers, variables, and operations. For example, 5x + 3 is an algebraic expression.

There are 2 coefficients: 2 and 3.

A term is a single part of an expression, while a factor is a number or variable that is multiplied together. For example, in 3xy, 3, x, and y are factors, and 3xy is a term.

To simplify an expression means to combine like terms and reduce it to its simplest form. For example, 2x + 3x simplifies to 5x.

A variable is a symbol, usually a letter, that represents an unknown value. For example, in the expression 2x + 5, x is the variable.

The coefficient of a variable is the number that is multiplied by the variable. For example, in 4y, the coefficient of y is 4.

Parentheses indicate which operations should be performed first in an expression. For example, in (2 + 3) × 4, you add 2 and 3 before multiplying by 4.