Question

For x = 4 the function
f(x) = x2 + bx + c has the
minimum value of --9. Find c.​

Answer 1

Answer:

Correct option is

A

maximum value

The graph of a quadratic equation is parabola.

If a<0, then the parabola opens downward. If the parabola opens downward, then the vertex is the point whose y-value is the maximum value of f