In the expression \(15x^2 + 2x + 9\), a constant is a term that does not contain any variables (in this case, \(x\)).
Here are the terms broken down:
- \(15x^2\) (variable term)
- \(2x\) (variable term)
- \(9\) (constant term)
From the options provided, the constant in the expression is:
B. 9