The question says " Polynomial Functions are shown below, plug in the following values as X to get the output values."

I know for sure that -x[SUP]4[/SUP]+x[SUP]2[/SUP]-2 is the answer that is considered correct for that problem because it was graded as correct I am just curious why it is considered correct instead of -x[SUP]4[/SUP]+5x[SUP]2[/SUP]-2. Hope that helps.

As a spin off from Bob Brown's post:

Two things:

(1) Is the original polynomial

f(x) = -x[SUP]2[/SUP]+5x-2

so that, in reality,

f(x[SUP]2[/SUP]) = -x[SUP]4[/SUP]+5x[SUP]2[/SUP]-2

(2) If that is the original polynomial 'printed in the book' it looks like maybe a typo and it should have been

f(x) = -x[SUP]2[/SUP]+x-2

so that

f(x[SUP]2[/SUP]) = -x[SUP]4[/SUP]+x[SUP]2[/SUP]-2