In the given expression, 4x^3 + 6x^2 + 7x + 9, the constant term is 9.
To determine the constant in the given expression, 4x^3 + 6x^2 + 7x + 9, we need to understand that constants are numbers that do not have any variables attached to them. In this expression, the constant is the term that does not contain any variable, which is 9. Therefore, the constant in the expression is 9.
