Which of the following are quadratic functions?

Check all that apply.

A. y=2(x-3x^2+1)
B. y=5+2x
C. y=1/2x^2-13x+4
D. y=x/x-1

Question

Which of the following are quadratic functions?

Check all that apply.

A.  y=2(x-3x^2+1)
   B.  y=5+2x
   C.  y=1/2x^2-13x+4
   D.  y=x/x-1

anonymous · Answer

do you know what a quadratic function is?

myininaya · Answer

is this a quadratic y=ax^2+bx+c?
and can a be zero?

anonymous · Answer

no sir

anonymous · Answer

i know a cant be zero and that it has to be in the form y=ax^2+bx+c

myininaya · Answer

so which of the above can you write in the form y=ax^2+bx+c

anonymous · Answer

i think a and c is that correct?

myininaya · Answer

good!

anonymous · Answer

wooot! thanks

anonymous · Answer

are you sure C is a quadratic equation? look at the definition

myininaya · Answer

$$y=\frac{1}{2}x^2-13x+4$$ is a quadratic

myininaya · Answer

is this not the function they have?

anonymous · Answer

oh. I thought the whole thing was on the denominator. but maybe not.

myininaya · Answer

maybe that is what the person meant but thats not how i read it