Question

i need help finding the domain and range of y=2x^2-8x+4

Answer 1

Domain: \(\mathbb{R}\) - Can youthink of a reason why anything wouldn't work in that expression on the right?

Range: Complete the square to put it in Vertex Form. It will bcome obvious.

Answer 2

i know the answer should be that the domain=any real number and the range=y is greater than or equal to -4. but i dont know how to get to that. i learned this a chpt ago and forgot how to do it

Answer 3

Did you do what I said in the last post?

Domain: What values doesn't work in the right hand expression. If there isn't anything, the Domina is All Real Numbers. Done.

Range: Do you know how to "Complete the Square" or have you heard of "Vertex Form"?

Answer 4

never heard of vertex form or maybe i have but it was called something else. complete the square sounds familiar. what is vertex form?