Question

Consider the quadratic function
f(x)=-4x^2-64x-7

a)Determine whether x has a minnimum or maximum value?

b)where does this value occur and what is it?

c) what are the domain and range?

Answer 1

Please help!

Answer 2

maximum value at x=-8
domain all real numbers
range negative infinite to -8

Answer 3

so the max value is -8, then where does it occur?

Answer 4

and how did you get these lol