Answer:
D= 10
Step-by-step explanation:

Answer:
Step-by-step explanation:
Next time, please share the possible answer choices.
A quadratic function with one real zero actually has TWO real, identical zeros. The vertex of the graph lies on the x-axis (touching it in only one place).
A. 12
12 isn’t a polynomial because the definition of a polynomial is an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable(s). So your answer will be A