Which represents a quadratic function? f(x) = −8x3 − 16x2 − 4xf (x) = x 2 2x − 5f(x) = 1f(x) = 0x2 − 9x 7

Option 2 is correct.

Step-by-step explanation:

We have been given three functions:

Quadratic function is the function having degree 2.

Option 1:

Here the highest power or degree of the function is 3

Hence, it is not quadratic.

Option 2:

Here, the degree of the function is 2.

Hence, quadratic.

Option 3:

f(x)=1

There is no degree since, no variable

Hence, not quadratic.

Option 4:

Here, degree of the function is 7

Hence, not quadratic.

answer: the answer is ann