What is f(x) = 2x2 28x – 5 written in vertex form?

What is f(x) = 2x2 28x – 5 written in vertex form?

a. f(x) = 2(x 7)2 – 19
b. f(x) = 2(x 7)2 – 103
c. f(x) = 2(x 14)2 – 14
d. f(x) = 2(x 14)2 – 98