Algebraic expression

 Algebraic expressions represents mathematical ideas and operations in a short way using symbols and variables.

Eg: 3a2+4b2-7

• Constant is a symbol in algebra which has a fixed value.

Eg: 8,-7,etc

• A symbol which can be assigned different numerical values is called a variable.

 Eg: a,b,c…..x,y,z

• A term is an arithmetic number, letter, group of letters or group composed of an arithmetic number and letters which are joined by multiplication or division

Eg: in the algebraic expression 5x+7y, 5x and 7 y are called terms.

• In a term the number factor of a product is the numerical coefficient and the letter factor variable of a product is the literal coefficient. 

Eg: in the term 45a2b, 45 is the numerical coefficient and a2b is called literal coefficient. 

• Like terms or similar terms are terms which have the same literal factors. 

Eg:5a,-7a,57a

• Unlike terms are those which have different literal factors.

Eg: 5xy,56y,5a

• Monomial is an algebraic expression of one term.

• Binomial is an algebraic expression of two terms.

• Trinomial is an algebraic expression of three terms.

• A polynomial is an algebraic expression of two or more terms