Answer:
x = - 4
Step-by-step explanation:
Given a parabola in standard form
f(x) = ax² + bx + c ( a ≠ 0 )
Then the equation of the axis of symmetry is
x = - [tex]\frac{b}{2a}[/tex]
f(x) = 2x² + 16x - 19 ← is in standard form
with a = 2, b = 16
Then the equation of the axis of symmetry is
x = - [tex]\frac{16}{4}[/tex] = - 4
