Question

Evaluate 3x3 - 2x2 - 5x + 4 when x = -1

Answer 1

Do you mean:

\[f(x) = 3x^3 - 2x^2 - 5x + 4\]
and they want you to find

\[f(-1)\]?

If so, this means:

\[f(-1) = 3(-1)^3 - 2(-1)^2 - 5(-1) + 4\]

Remember the following:

\[(-1)^2 = 1\]
\[(-1)^3=-1\]

Hope this helps! :)