Question

What is the relative maximum and minimum of the function?

f(x) = 2x2 + 28x - 8
A. Minimum Value: -7 Range y > -7
B. Minimum Value: -106 Range y > -7
C. Minimum Value: 7
Range y > 7

Answer 1

i think the answer is c but idk

Answer 2

f(x) = 2x2 + 28x - 8
=2(x^2+14x-4)
=2(x^2+14x+49-49-4)
=2(x+7)^2+2(-53)
=2(x+7)^2-106

Answer 3

So the answer would be B?