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In mathematics, a constant term is a term in an algebraic expression that does not contain any variables and therefore is constant. For example, in the quadratic polynomial

the 3 is a constant term.

After like terms are combined, an algebraic expression will have at most one constant term. Thus, it is common to speak of the quadratic polynomial

where x {\displaystyle x} is the variable, as having a constant term of c . {\displaystyle c.} If the constant term is 0, then it will conventionally be omitted when the quadratic is written out.

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