Question

HELP !!! Evaluate f(-2) for the function f(x) = 3x2 + 2x - 5

Answer 1

3

Explanation:

So we have the function:

`f(x)=3x^2+2x-5`

To evaluate the value of f(-2), substitute -2 for x. Thus:

`f(-2)=3(-2)^2+2(-2)-5`

Square first:

`f(-2)=3(4)+2(-2)-5`

Multiply:

`f(-2)=12-4-5`

Now, subtract:

`f(-2)=8-5=3`

So:

`f(-2)=3`

And we're done!