Question

If f(x) = - 3x3 -- x2 +8
what is f(-2)?

Answer 1

f(-2) = 28

Explanation:

Given that,

`f(x) = - 3x^3 -x^2 +8`

We need to find the value of f(-2). Put x = -2 in the given function. SO,

`f(-2) = - 3(-2)^3 -(-2)^2 +8\\\\=24-4+8\\\\=28`

So, the value of f(-2) is equal to 28.