For The First Photo:
Answer:
A and D are not polynomials.
Step-by-step explanation:
The rule for a expression to be a polynomial is that:
- A polynomial can not have a fractional power.
- A polynomial can not have a negative power.
A has a fractional power so that is not a polynomial.
D has a negative power so that isn't a polynomial.
- This is because in this last expression (D), the letter Z, is on the bottom of a fraction. This means that Z has a negative power.
