I was wondering if someone could walk me through how to find the Domain and Range please and thank you.

Question

anonymous · Answer

$$2x^2-4x-8$$

is an example of the problems I am working with.

anonymous · Answer

I understand Range place the X with 0, solving for Y.

I tis just the range that throws me off.

anonymous · Answer

Mean domain

anonymous · Answer

I think your confusing "domain/range" with "intercept"
Domain is "what x can be"
Range is "what y can be"
What values could we give to x here?

anonymous · Answer

Ah yes I did have them mixed up. But I have trouble finding the X intercept as well.

anonymous · Answer

Y intercept I can find, Domain/Range and X intercepts I can not.

anonymous · Answer

I found this website that has been very helpful for me www.wolframalpha.com