Which of the following functions is quadratic?

Question

asked Aug 15, 2020 160k views

2 Answers

Jimmy Fagerholm · Answer 1 · 2020-08-22T08:13:06+0000

Answer:sd

D.
$f\left(x\right)=2x^2+3x-5$

Explanation:

Given choices are:

$f\left(x\right)=(2)/(x^2)$

$f\left(x\right)=3\left(3-x\right)$

$f\left(x\right)=7^2$

$f\left(x\right)=2x^2+3x-5$

Now we need to find about which of them is the quadratic function.

We know that quadratic function is written in form of
$f\left(x\right)=ax^2+bx+c$

Last choice looks similar to that form.

Hence coorect choice is D.
$f\left(x\right)=2x^2+3x-5$