
A coefficient is a number multiplied by one or more variables.^{[1]} In the term 3x, the coefficient is 3. In figure 1, the coefficients are red. The coefficients in figure 1 are (3, 2, 4, 1). A variable without a coefficient has an implied coefficient of 1 (x^{3} = 1·x^{3}). In the expression x^{2} + 5, the term containing x^{2} has an implied coefficient of 1. Applying the property of multiplying by 1 to the term gives x^{2} = 1·x^{2}. 
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