Which represents a quadratic function? f(x) = 2x3 + 2x2 – 4 f(x) = –7x2 – x + 2 f(x) = –3x + 2 f(x) = 0x2 + 3x – 3

Second option:

Step-by-step explanation:

A quadratic function has the form:

(Where )

You can observe that the highest exponent of a quadratic function is 2.

Then, let's check which of the options shows a quadratic function:

1)

Its highest exponent is 3, then this is not a quadratic function.

2)

Its highest exponent is 2 and , then this is a quadratic function.

3)

Its highest exponent is 1, then this is not a quadratic function.

4)

You can observe that , then this is not a quadratic function.

question is incomplete.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this