Question

Identify the quadratic equation from the following.3x2 + 5x = 03x - 5 = 0y = 3x3 + 7x2 - 9xAll of the choices

Answer 1

A quadratic function is of the form:

`y=ax^2+bx+c`

That is, a function of degree 2.

- In this case, the function

`3x^2+5x=0`

It is a function of degree 2, so it is a quadratic function.

- For the function

`3x-5=0`

We see that it does not have a term of degree 2, therefore it is not a quadratic function.

- And for the function

`y=3x^3+7x^2-9x`

It is a function of degree 3, therefore, it is not a quadratic function.

Answer:

`3x^2+5x=0`