Answer:
False, it's f(-3)
Step-by-step explanation:
the standard formula for a quadratic equation is
y = ax² + bx + c
The formula for the vertex is
(x, y) = (-b/2a, f(-b/2a))
First Step: Use x = -b/2a to find the x-coordinate of the vertex
x = -6/(2*1)
x = -3
Now plug that into the equation to find the y-value
f(-3) = (-3)² + 6(-3) + 5
f(-3) = 9 - 18 + 5
f(-3) = -4
