What is the axis of symmetry of h (x) = 5x^2+40x + 64?

Answer: x=-4

Axis of symmetry is x = - 4

Step-by-step explanation:

h (x) = 5x^2+40x + 64

Use the formula for axis of symmetry: x = - b / (2a)

Here, a = 5, b = 40, c = 64

so

x = - 40 / (2*5) = - 40/10 = - 4

Axis of symmetry is x = - 4