What is the y-value of the vertex of the function f (x) = - (x-3) (x+11) ?

-8

-4

33

49

49 just took the unit review

49

Step-by-step explanation:

f (x) = - (x-3) (x+11)

The zeros of the equation are 3 and - 11

The vertex is 1/2 way between the two values

(3+-11) / 2 = - 8/2 = - 4

The vertex is at x = - 4

We substitute this value into the equation to find the y value

f (x) = - (-4-3) (-4+11)

= - (-7) (7)

=49