which equivalent form of g(x)=2x^2-12x-54 is the best form to find the zeros of the function?
a) g(x)=2(x-3)^2-72
b) g(x)=2(x^2-6x-27)
c) g(x)=2(x-9)(x-3)
d) g(x)=2x^2-18x+6x-54