Answer:
Step-by-step explanation:
a = -4 , b = 16 and c = -17
[tex]x =\dfrac{-b}{2a}\\\\x = \dfrac{-16}{2*(-4)}\\\\\\ =\dfrac{-16}{-8}\\\\\\\\[/tex]
x = 2
y = -4(2)² + 16*2 - 17
= -4*4 + 32 - 17
= -16 + 32 - 17
y = -1
Vertex (2, -1)
axis of symmetry: x = 2
