Answer: x= 5/2
Step-by-step explanation::)
The axis of symmetry of h(x) = 5x2 + 40x + 64 = -4
The formula for calculating the axis of symmetry is expressed as:
Axis of symmetry x = -b/2a
h(x) = 5x^2 + 40x + 64
a = 5 and b = 40
Umm not really sure but I'd go with A. You may need another source to double check my answer, I'm probably wrong.