Monomials A monomial is an algebraic expression that consists of only one term. (A term is a numerical or literal expression with its own sign.) For instance, 9 x , 4 a 2 , and 3 mpx 2 are all monomials. The number in front of the variable is called the numerical coefficient. In 9 x , 9 is the coefficient. Adding and subtracting monomials To add or subtract monomials,
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