Question

What is the domain of the quadratic function
f(x) = 2x2 - 12x + 8?
A. [-8 ,infinty sign )
B. (-infinity ,infinity )
C. (-2 , 8)
D. (-infitity sign , 8]

Answer 1

PLEASE HELP QUICKLY THANKS:)

Answer 2

the domain of ANY quadratic is ALWAYS the set of all real numbers because you can plug in any real number for x to get some output for y


Also, the domain of ANY polynomial is ALWAYS the set of all real numbers because you can plug in any real number for x to get some output for y

Answer 3

oh and its 2x^2-12x+8

Answer 4

so what does that translate to in interval notation?

Answer 5

Im not sure, I'm only and Algebra 1 honors student

Answer 6

*im only a

Answer 7

well the interval (2, 12) describes the set of numbers between 2 and 12 (not including 2 and 12)

something like [2, 12) now includes 2, but still leaves out 12

[2, 12] now includes 12

Answer 8

so how would we include all real numbers

Answer 9

(0,infinity) would be all the positive real numbers
(-infinity,0] would be all the negative real numbers and 0
so how would we write all the real numbers, using what I and jim have said.

Answer 10

(-infinity, infinity)

Answer 11

yep you got it _kelenn_