I am being prompted to find f(-x) of the following function:

So plug in -x for x.

(4*-x) + 1/(4*-x)

-4x + 1/(-4x)

Find a common denominator, which in this case is -4x. So, I multiplied the left term by (-4x)/(-4x)

This gives me 16x^2 + 1/(-4x)

Is that correct? I only have one attempt remaining in my web applet.