A constant is a term that has no variable. Since a constant has no variable, the value of the constant will remain fixed or never change.
1. For the polynomial expression 6a3 + 4a2 + a - 8, the constant is -8
2. For the quadratic equation a2 + 3a + 2 = 0, the constant is 2
3. For the linear equation 2x - 6 = 9, the constants are -6 and 9
4. For the circumference formula C = πD, the constant is π = 3.14