Quadratic function g opens downward, and goes through (4,-5), (8,-5) with a vertex (6,-1). Is the discriminant of g positive, zero, or negative?
Choices:
A:Positivie
B:Zero
C:Negative
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: Quadratic function g opens downward, and goes through (4,-5), (8,-5) with a vertex (6,-1). Is the discriminant of g positive, zero, or negative?
Choices:
A:Positivie
B:Zero
C:Negative
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: Quadratic function g opens downward, and goes through (4,-5), (8,-5) with a vertex (6,-1). Is the discriminant of g positive, zero, or negative?
Choices:
A:Positivie
B:Zero
C:Negative