Parts of an Expression

A coefficient is a numerical factor that multiplies a variable in an expression. For example, in the expression $$9a - 12$$ , the coefficient of $$a$$ is 9.

A variable is a letter or symbol that represents an unknown number. For example, in the expression $$3x + 5$$ , $$x$$ is a variable.

There are 4 terms in the expression: $$3a$$ , $$2b$$ , $$-c$$ , and $$10$$ .

These letters are called variables, as they represent unknown values.

$$4x$$ is a term in the expression.

A constant is a fixed value that does not change. For example, in the expression $$5x + 3$$ , the number 3 is a constant.

A term is a single mathematical expression that can be a number, a variable, or a combination of both multiplied together. For example, $$7y$$ and $$-2$$ are both terms.

A term is a part of an expression that can include numbers and variables, while a coefficient is the numerical part of a term that multiplies the variable.

To simplify an expression means to combine like terms and reduce it to its simplest form.

An algebraic expression is a combination of numbers, variables, and operations (like addition and multiplication) that represents a value.