Question

How do you evaluate the function `f(x)=x^3-2x^2+5x-8` for f(-5)?

Answer 1

Just replace the value of `x` with `-5` in the formula of `f(x)`

hence

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

`f(-5)=-125-50-25-8`

`f(-5)=-208`