The constant term in the expression
is 6.
Let's find the constant term step by step in the expression

The expression is in the form
where:
- a is the coefficient of the quadratic term,
- b is the coefficient of the linear term, and
- c is the constant term.
Expression
, the quadratic term is
, the linear term is 3x, and the constant term is 6.
So, the constant term (c) is 6.