A coefficient is a numerical factor of a term. In other words, it is the number that multiplies the variable factor.
For example, in the expression 5x + 2, 5 is the numerical factor and x is the variable factor.
The coefficient is 5 since 5 is the numerical factor. You can also say that 5 is the number that multiplies the variable factor x.
1. For the polynomial expression 2a6 + 4a, the coefficients are 2 and 4
2. For the linear equation 3a + 2 = 0, the coefficient is 3