The standard form of the equation of a parabola is y = 2x2 + 16x + 17. What is the vertex form of the equation?
A. y = 2(x+8)2 - 15
B. y= 2(x + 4)2 - 15
C. y = 2(x + 8)2 + 9
D. y = 2(x + 4)2 + 9​

It's B