Question

Which equation is NOT a quadratic equation?
Answer

y = x2 + 6x - 5

y = 2x + 5

y = 2x2 + 5

y = 4x2

I tried putting them in my calculator to see which was a parabola, but none of them were. Am I doing something wrong? I am very confused haha.

Answer 1

You are doing something terribly wrong

Answer 2

You dont put it in the calculator

Answer 3

You have to just look at it

Answer 4

What do you know about quadratic equations?

Answer 5

It seems like you are not even trying

Answer 6

If you are not even going to try, I wont bother to help you

Answer 7

I haven't done algebra since 8th grade so I have absolutely no idea what I'm doing. If you tell me how to go about it I can, but I'm drawing a blank on everything.

Answer 8

Do you know what is a quadratic equation is? And what is the difference between linear and quadratic equations?

Answer 9

Yes

Answer 10

What is a quadratic equation then? The answer should be obvious just by looking at the equations if you know what it is.

Answer 11

A quadratic has an exponent of 2 for one of its variables. Which option does not have an exponent of 2?

Answer 12

Oh wow I didn't even see that one didn't have an exponent

Answer 13

I feel silly. Thank you! Haha I should definitely re-read the answers next time.

Answer 14

I was graphing them trying to see which one wasn't a parabola when I could have just read the answers properly. How dumb. Thanks again haha

Answer 15

Don't put yourself down or call yourself dumb.

So, which answer is it? Let's confirm. @emgerr

Answer 16

It's B. don't worry I've got it. thanks again

Answer 17

I agree.