Final answer:
After simplification, there will be 4 terms in the expression 4x^3 + 9y^2 - 3x + 2 - 1.
Step-by-step explanation:
To determine the number of terms in the simplified expression 4x^3 + 9y^2 - 3x + 2 - 1, we need to combine like terms. Like terms have the same variable(s) and exponent(s).
In this expression, we have four terms: 4x^3, 9y^2, -3x, and 1. The terms 2 and -1 are constants and don't have any variables.
When we simplify the expression by combining like terms, we still have four terms: 4x^3, 9y^2, -3x, and 1. Therefore, the answer is b) 4.