Question

Find f(–2) for the function f(x) = 3x2 – 2x + 7. −13 −1 1 23

Answer 1

f(-2) = 23

Explanation:

`f(x)=3x^2-2x+7\\\\f(-2)\to\text{put x = -2 to the equation of a function:}\\\\f(-2)=3(-2)^2-2(-2)+7=3(4)+4+7=12+4+7=23`

Answer 2

The correct option is 4. The value of f(-2) is 23.

Explanation:

The given function is

`f(x)=3x^2-2x+7`

We have to find the value of f(-2). It means we need to find the value of function f(x) at x=-2.

Substitute x=-2 in the given function to find the value of f(-2).

`f(-2)=3(-2)^2-2(-2)+7`

On simplification we get

`f(-2)=3(4)-(-4)+7`

`f(-2)=12+4+7`

`f(-2)=23`

The value of f(-2) is 23. Therefore the correct option is 4.