Definitions:A term in an algebraic expression can be a constant, a variable or a product of constants and variables separated by the signs of addition (+) or subtraction (− ) . Examples: 27, x, xyz, 21​ x2 yz etc.The number factor of the term is called its coefficient.
The expression
x2 + x + 1 consists of three terms , i.e.,​
x2, x and 1.The coefficient of each term is 1.